%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Waldvogel_etal2005} Waldvogel, D., Figner, B., \& Eich, D. (2005). Illicit methadone injecting during methadone maintenance treatment in a specialised out-patient clinic. \textit{Swiss Medical Weekly}, \textit{135}(43-44; 29.10.2005), 644--646.

\end{thebibliography}

\end{document}

