[Tex/LaTex] Citation in plain text

Question

I need to cite a paper at the end of a quotation right after the end of the text in beamer. In my example the reference appears after the text, but in italics. How can I change it to the normal font?

Answer 1

If you use the quote environment with a \cite you can insert \upshape just before the citation, which switches to an upright font (rather than italic).

\documentclass{beamer}

\begin{document}
\begin{frame}
  \begin{quote}
    ``quotation''\cite{author}
  \end{quote} 
  \begin{quote}
    ``quotation''\upshape\cite{author}
  \end{quote} 
Citation outside quote: \cite{author}
\end{frame}

\begin{frame}
\begin{thebibliography}{9}
\bibitem{author}
Something written by someone.
\end{thebibliography}

\end{frame}
\end{document}