# Synchronizing BibTeX in Overleaf (BibLaTeX) and Texmaker (MiKTeX, Apacite)

In this post I detail how to get bibtex working on Overleaf (previously known as WriteLatex) and Texmaker (Windows 10 64-bit, MikTeX). Note that the citation format I’m using is APA, as specified by my university.

Overleaf may have the advantage of having collaborative editing with (almost) live previewing, but I hit a lot of problems getting the documents with bibtex I wrote there to compile in Texmaker. It just doesn’t compile. Conversely, copy-pasting working bibtex code from TexMaker into Overleaf pulls out compile errors.

So the best workflow I can come out with at the moment is this: Create latex document from my template (get from here: Overleaf to Texmaker Bibtex Template. There should be 2 files: main.tex and ref.bib. If the template link is not working, you can get from this Github gist instead), edit the latex document collaboratively in Overleaf, and then when you need it to compile in Texmaker, download the project as a zip and change some code.

Fortunately, it’s only 2 blocks of code, annotated as “SETUP DOCUMENT” and “END DOCUMENT”. You’ll find this in the start and end of the latex document respectively. These code blocks (provided in the template; the texmaker version is commented out) will need to be changed when moving your code back to TexMaker.

#### Overleaf

SETUP DOCUMENT:

% BEGIN -- SETUP DOCUMENT --
\documentclass[a4paper,12pt]{article}
\usepackage[utf8]{inputenc}
\usepackage[british]{babel}
\usepackage{csquotes}
\usepackage[backend=biber,style=apa]{biblatex}
\DeclareLanguageMapping{british}{british-apa}
\usepackage[pdftex]{graphicx}
\let\cite\parencite
\begin{document}
% END -- SETUP DOCUMENT --


END DOCUMENT:

% BEGIN -- END DOCUMENT --
\printbibliography
\end{document}
% END -- END DOCUMENT --


#### TexMaker

SETUP DOCUMENT:

% BEGIN -- SETUP DOCUMENT --
\documentclass[a4paper,12pt]{article}
\usepackage{hyperref}
\usepackage{apacite}
\begin{document}
\bibliographystyle{apacite}
% END -- SETUP DOCUMENT --


END DOCUMENT:

% BEGIN -- END DOCUMENT --
\bibliography{ref}{}
\end{document}
% END -- END DOCUMENT --


If you receive warning messages in TexMaker that goes something like

Citation ‘blablabla2007’ undefined

when you press F1 (quickbuild), you will need to enable bibtex in your build. To do this, go to “options > Configure TexMaker” and under “Quick Build” tab, select the quick-build command “PdfLatex + Bib(la)tex + PdfLaTeX (x2) + View Pdf”

Tip: You can generate bibtex code from easily with bibme.org.

There is another variation of this: separate your content into another *.tex file, and then you have 2 master documents – one for Overleaf (main.tex) and another you use for TexMaker (main-texmaker.tex or whatever name you want) – which both includes the same content file. In TexMaker, you’ll need to set one document to be a master document to work with multiple files.

Have fun with Overleaf!