# Biblatex Bibliography Style Invalidated

Biblatex provides several standard citations styles, if no citation style is set LaTeX uses the one that matches the bibliography style. Below you can see an example:

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage[ backend=biber, style=alphabetic, citestyle=authoryear ]{biblatex}   \addbibresource{sample.bib}%Imports bibliography file   \begin{document}\section{First section}   This document is an example, two items are cited: \textit{The \LaTeX\ Companion} book is \cite{latexcompanion}, and Einstein's journal paper is \cite{einstein}.   \medskip   \printbibliography\end{document}

The parameter passed to the command that imports biblatex is the one that sets the citation style, in this case authoryear. The standard citation styles are:

• Implements a numeric citation scheme intended for in-text citations. Should be employed in conjunction with the numeric bibliography style.
• Compact variant of the mode. Citations like [1, 2, 3] are replaced by [1-3].
• Verbose variant of the style. Instead of [2, 5, 7] will print [2];[5];[7].
• Alphabetic citation scheme similar to the standard in style bibtex. To be used in conjunction with the alphabetic bibliography style.
• Verbose version of the style. Instead of [Doe98, Doe95, Farn2004] will print [Doe98];[Doe95];[Farn2004].
• Implements the author-year citation scheme. To be used in conjunction with the author-year bibliography style.
• Compact variant of the style. Prints the author only once if subsequent references passed to a single citation command share the same author. Prints Doe 1992, 1995 instead of Doe 1992, Doe 1995.
• A variant of the intended for footnote citations. Replaces repeated citations by the abbreviation ibidem.
• A style combining the features of and
• Implements the author-title scheme. Intended for citations given in footnotes.
• Compact variant of . Instead of Doe, First title; Doe, Second title this will print Doe, First title, Second title.
• A variant of the intended for footnote citations. Replaces repeated citations by the abbreviation ibidem.
• A style combining and .
• Variant of that only prints the title if the bibliography contains more than one work of the respective author/editor.
• Style combining and .
• Style combining and .
• Citation style that prints a full citation when the entry is cited for the first time and a short version afterwards.
• Citation style that goes with the bibliography style by the same name. Loads the style.

There are other non-standard citation styles popular in different journals and thesis

• In Sciences:
• American Chemical Society (ACS) style
• American Institute of Physics (AIP) style
• American Mathematical Society (AMS) style
• Vancouver system
• Institute of Electrical and Electronics Engineers (IEEE) style
• Nature style
• Science style
• In Humanities:
• Chicago Style
• Harvard referencing style
• MLA style
• In Socials:
• American Psychological Association (APA) style
Citation style stylename
ACS
AIP (*)
Nature
Science
IEEE
Chicago
MLA
APA

(*) this is a new style, see http://ctan.org/pkg/biblatex-phys

Open an example of the biblatex package in ShareLaTeX

When it comes to bibliography management packages, there are three main options in LaTeX: bibtex, natbib and biblatex. Biblatex is a modern program to process bibliography information, provides an easier and more flexible interface and a better language localization that the other two options. This article explains how to use biblatex to manage and format the bibliography in a LaTeX document.

## Introduction

A minimal working example of the biblatex package is shown below:

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage{biblatex}\addbibresource{sample.bib}   \begin{document} Let's cite! The Einstein's journal paper \cite{einstein} and the Dirac's book \cite{dirac} are physics related items.   \printbibliography   \end{document}

There are four bibliography-related commands in this example:

Imports the package biblatex.
Imports the bibtex data file sample.bib, this file is the one that includes information about each referenced book, article, etc. See the bibliography file section for more information.
This command inserts a reference within the document, [1] in this case, that corresponds to an element in the bibliography, "einstein" is a keyword corresponding to an entry in sample.bib.
Prints the list of cited references, the default title is "References" for the article document class and "Bibliography" for books and reports.

ShareLaTeX provides several templates with pre-defined styles to manage bibliography. See this link

Open an example of the biblatex package in ShareLaTeX

## Basic usage

Several parameters can be passed to the package import command, as in the following example:

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage{comment}   \usepackage[ backend=biber, style=alphabetic, sorting=ynt ]{biblatex}\addbibresource{sample.bib}   \title{Bibliography management: \texttt{biblatex} package}\author{Share\LaTeX}\date{}   \begin{document}   \maketitle   Using \texttt{biblatex} you can display bibliography divided into sections, depending of citation type. Let's cite! Einstein's journal paper \cite{einstein} and the Dirac's book \cite{dirac} are physics related items. Next, \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Donald Knuth's website \cite{knuthwebsite}, \textit{The Comprehensive Tex Archive Network} (CTAN) \cite{ctan} are \LaTeX\ related items; but the others Donald Knuth's items \cite{knuth-fa,knuth-acp} are dedicated to programming.   \medskip   \printbibliography   \end{document}

Some extra options, inside brackets and comma-separated, are added when importing biblatex:

Sets the backend to sort the bibliography, is the default one and recommended since it provides full localization for several commands and the styles for biber are easier to modify because they use standard LaTeX macros. The other supported backend is , which is a more traditional program; if set as the backend, bibtex will only be used to sort the bibliography, so no bibtex styles can be used here.
Defines the bibliography style and the citation style, in this case . Depending on the style, more citation commands might be available. See biblatex bibliography styles and citation styles for more information.
Determines the criteria to sort the bibliographic sources. In this case they are sorted by year, name and title. See the reference guide for a list of sorting options.

The rest of the commands were explained in the introduction.

Open an example of the biblatex package in ShareLaTeX

## The bibliography file

The bibliography files must have the standard bibtex syntax

This file contains records in a special format, for instance, the first bibliographic reference is defined by:

This is the first line of a record entry, tells BibTeX that the information stored here is about an article. The information about this entry is enclosed within braces. Besides the entry types shown in the example (, , and ) there are a lot more, see the reference guide.
The label is assigned to this entry, is a unique identifier that can be used to refer this article within the document.
This is the first field in the bibliography entry, indicates that the author of this article is Albert Einstein. Several comma-separated fields can be added using the same syntax , for instance: title, pages, year, URL, etc. See the reference guide for a list of possible fields.

The information in this file can later be printed and referenced within a LaTeX document, as shown in the previous sections, with the command . Not all the information in the .bib file will be displayed, it depends on the bibliography style set in the document.

Open an example of the biblatex package in ShareLaTeX

## Customizing the bibliography

Biblatex allows high customization of the bibliography section with little effort. It was mentioned that several citation styles and bibliography styles are available, and you can also create new ones. Another customization option is to change the default title of the bibliography section.

\documentclass{article}\usepackage[utf8]{inputenc}\usepackage[english]{babel}   \usepackage{comment}   \usepackage[ backend=biber, style=alphabetic, sorting=ynt ]{biblatex}\addbibresource{sample.bib}   \title{Bibliography management: \texttt{biblatex} package}\author{Share\LaTeX}\date{}   \begin{document}   \maketitle   Using \texttt{biblatex} you can display bibliography divided into sections, depending of citation type. Let's cite! The Einstein's journal paper \cite{einstein} and the Dirac's book \cite{dirac} are physics related items. Next, \textit{The \LaTeX\ Companion} book \cite{latexcompanion}, the Donald Knuth's website \cite{knuthwebsite}, \textit{The Comprehensive Tex Archive Network} (CTAN) \cite{ctan} are \LaTeX\ related items; but the others Donald Knuth's items \cite{knuth-fa,knuth-acp} are dedicated to programming.   \medskip   \printbibliography[title={Whole bibliography}]

The additional parameter passed inside brackets to the command is the one that changes the title.

The bibliography can also be subdivided into sections based on different filters, for instance: print only references from the same author, the same journal or similar title. Below an example.

\printbibliography[type=article,title={Articles only}]\printbibliography[type=book,title={Books only}]   \printbibliography[keyword={physics},title={Physics-related only}]\printbibliography[keyword={latex},title={\LaTeX-related only}]

Here, the bibliography is divided in 4 sections. The syntax of the commands used here is explained below:

Only prints entries whose type is "article", and sets the title "Articles only" for this section. The same syntax works for any other entry type.
Filters bibliography entries that include the word "physics" in any of the fields. Sets the title "Physics-related only" for said section.

Open an example of the biblatex package in ShareLaTeX

For the bibliography the be printed in the table of contents an extra option must be passed to

• The second case is that adds the title as a second level entry in the table of contents, in this example as a subsection nested in "Whole bibliography".

Open an example of the biblatex package in ShareLaTeX

## Reference guide

Supported entry types

 article book mvbook inbook bookinbook suppbook booklet collection mvcollection incollection suppcollection manual misc online patent periodical suppperiodical proceedings mvproceedings inproceedings reference mvreference inreference report set thesis unpublished custom conference electronic masterthesis phdthesis techreport

Supported entry fields (The printed information depends on the bibliography style)

 abstract addendum afterword annotate author authortype bookauthor bookpagination booksubtitle booktitle chapter commentator date doi edition editor editortype eid entrysubtype eprint eprinttype eprintclass eventdate eventtitle file foreword holder howpublished indextitle institution introduction isan isbn ismn isrn issue issuesubtitle issuetitle iswc journalsubtitle journaltitle label language library location mainsubtitle maintitle month note number organization origdate origlanguage origlocation origpublisher origtitle pages pagetotal pagination part publisher pubstate reprinttitle series shortauthor shortedition shorthand shorthandintro shortjournal shortseries shorttitle subtitle title translator type url venue version volume year

Bibliography sorting options

option description
sort by name, title, year
sort by name, year, title
sort by name, year, volume, title
sort by alphabetic label, name, year, title
sort by alphabetic label, name, year, volume, title
sort by year (descending), name, title
entries are processed in citation order

For detailed information on these entries and options, see the package documentation.