%&LaTeX
\documentclass{article}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}

\begin{document}

\begin{thebibliography}{1}

\bibitem{Bull_etal2011} {\textquotedblleft}\textit{An intrusive portrait by Goya}{\textquotedblright}. Bull D, Krekeler A, Alfeld M, Dik J, Janssens K, The Burlington magazine \textbf{153}, 668 (2011)

\end{thebibliography}

\end{document}

