%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Giroud_etal1999} Giroud, C., Broillet, A., Augsburger, M., Menetrey, A., Bernhard, W., Rivier, L., et al. (1999). {\textquotedblleft}Cannabis sativa ssp. helvetica{\textquotedblright} ou le roman feuilleton du cannabis en Suisse. \textit{Toxicorama}, \textit{11}(1), 51--58.

\end{thebibliography}

\end{document}

