[Tex/LaTex] Cite references in figure caption

apa-stylecaptionscitinggraphics

Problem:

Getting error messages when trying to cite a reference in the figure caption. Not sure what I am doing wrong. Can't seem to find that this has been up previously either.

Minimal Working Example:

\documentclass{book}
\usepackage[utf8]{inputenc}
\usepackage[pdftex]{graphicx}
\usepackage{epstopdf}
\graphicspath{{figures/}}

\usepackage{apacite}
\bibliographystyle{apacite}

\usepackage{filecontents}
\begin{filecontents}{\jobname.bib}
@article{rub14,
   author = {Rubin, Jared},
   title = {Printing and {Protestants}: An empirical test of the role of printing in the {Reformation}},
   journal = {Review of Economics and Statistics},
   volume = {96},
   number = {2},
   pages = {270--286},
   year = {2014},
}
\end{filecontents}

\begin{document}
\begin{figure}[htp]
\centering
\includegraphics[width=\textwidth]{conceptdriven.eps}
\caption{\label{fig:researchscope}The process of concept-driven design approach in relation to theory and use situation, adopted from \citeA[p.~282]{rub14}} 
\end{figure}

\bibliography{\jobname}

\end{document}

Desired outcome:

The reference to be directly after the words "adopted from".

Best Answer

The macro \citeA is "fragile", in the LaTeX-specific sense of the word. If it occurs inside a "moving argument" (more LaTeX jargon, sorry), such as the argument of a \caption instruction, one must prefix a \protect instruction:

\caption{\label{fig:researchscope}The process of concept-driven 
  design approach in relation to theory and use situation, 
  adopted from \protect\citeA[p.~282]{rub14}}

For another example of this type, see the posting Using \input{} inside caption.

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