%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Vleugels+VanGrieken1991} {\textquotedblleft}\textit{Weathering of treated and untreated limestones in atmospheric exposures}{\textquotedblright}. Vleugels GJ, Van Grieken RE, Journal of preservation technology \textbf{23}, 48 (1991)

\end{thebibliography}

\end{document}

