I'm attempting to make my bibliography numbering style begin with the section number followed by an arabic number for each entry. For example:

25.7      REFERENCES

25.7.1    First Reference
25.7.2    Second Reference


Similar to my previous question on aligning section headers, I would want the bibliography item numbers also in the left margin.

Here's my MWE, which has obvious issues. This is as close as I can get.

\documentclass[letterpage,10pt]{report}

\usepackage{chngcntr}
\usepackage{enumitem}

%Set page margins

\usepackage{titlesec}
\renewcommand\thesection{25.\arabic{section}}   %Add "25." before section numbering
\setcounter{section}{6}   %Set first section number to "7" for this MWE
%https://tex.stackexchange.com/questions/361509/align-all-text-excluding-section-list-numbers
\titleformat{\section}{\normalfont\bfseries}{\llap{\makebox[0.75in][l]{\thesection}}}{0em}{\MakeUppercase}

\usepackage{etoolbox} %Patch bibliography style to it doesn't go to the next page
\patchcmd{\thebibliography}{\chapter*}{\section*}{}{}

\setlength\parindent{0pt}   %no indent for all paragraphs

\begin{document}

\section{References}

\renewcommand\bibitem{25.\arabic{section}. }   %Add section number before reference numbering

\begin{thebibliography}{9}

\bibitem{Reference 1}

\bibitem{Reference 2}

\end{thebibliography}

\end{document}


• I assume you're interested in using some kind of numeric style for citation call-outs. Should the citation call-outs continue to appear as [1], [2], etc. in the body of the document, or should they appear as [25.7.1], [25.7.2], etc? – Mico Apr 6 '17 at 20:59
• Citations should appear 25.7.1 in the text, no brackets. – grfrazee Apr 6 '17 at 21:01
• And if cited material is used twice in different sections, I guess it should get the number of the first section it was used in?! – Skillmon Apr 6 '17 at 21:05
• Not entirely sure what you mean, but there is only one References section in the entire document. – grfrazee Apr 6 '17 at 21:07
• Oh. Now I think I get it... You just want them all to be 25.7.xx (where 25.7 is the section 'REFERENCES'). First I thought you wanted them to be numbered after the section they were cited in. – Skillmon Apr 6 '17 at 21:18

You can do this by patching the internal command \@bibitem, which as standard uses only a simple list counter, and changing the \@biblabel command as follows:

\makeatletter
\patchcmd{\@bibitem}{\the\value{\@listctr}}{\thesection.\the\value{\@listctr}}{}{Bib patch failed}
\def\@biblabel#1{[\thesection.#1]}
\makeatother


Note that you have already loaded etoolbox and you have already set-up \thesection to produce the information you wish. In the code below, I have removed much of your other formatting set-up that is not relevant to this problem. Further to your comment, I have now added hyperref to show it works with this (you just need to be careful about the execution order) and have added further adjustments to the bibliography environment and \@biblabel so the labels are printed in the margin.

\documentclass{report}

\renewcommand\thesection{25.\arabic{section}}

\setcounter{section}{6}

\usepackage{etoolbox}
\usepackage{hyperref}
\patchcmd{\thebibliography}{\chapter*}{\section*}{}{}
\patchcmd{\thebibliography}{\leftmargin\labelwidth}{\leftmargin0pt}{}{}
\makeatletter
\patchcmd{\@bibitem}{\the\value{\@listctr}}{\thesection.\the\value{\@listctr}}{}{Bib patch failed}
\def\@biblabel#1{\llap{[\thesection.#1]\ }}
\makeatother

\renewcommand{\bibname}{}

\begin{document}

\section{Text}

\cite{R1} and \cite{R2}

\section{References}

\begin{thebibliography}{9}
\bibitem{R1} Reference 1

\bibitem{R2} Reference 2
\end{thebibliography}

\section{More text}

\cite{S1,R1}

\section{More references}

\begin{thebibliography}{9}
\bibitem{S1} Reference 3
\end{thebibliography}

\end{document}


The above prints the labels right aligned followed by a space before the left margin. If you wished to copy your section labelling style exactly then use the following definition for \@biblabel instead:

\def\@biblabel#1{\llap{\makebox[0.75in][l]{[\thesection.#1]}}}

• This does work, but I realized that it conflicts with the hyperref package that I'm using if I don't load hyperref after your additions for the bib numbering. However, it doesn't account for the margin spacing concerns I brought up via reference to my previous question. Any thoughts on that? – grfrazee Apr 11 '17 at 13:36
• Thanks for the update. Where you have \labelwidth as the width of the left margin, how would one change this to be 0.75in? I have the section numbers in a 0.75in-wide margin in the rest of the document, and having the reference numbers align left with these is the desired effect. – grfrazee Apr 13 '17 at 15:29
• You misunderstand, the \labelwidth is in code that is being deleted from the standard definition. Anyway all you need is a different definition of \@biblabel now added to my answer at the end. – Andrew Swann Apr 16 '17 at 12:59