%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Rihs-Middel_etal2005} Rihs-Middel, M., H{\"a}mmig, R., \& Jacobshagen, N. (2005). \textit{Heroin-assisted treatment : work in progress}  (Swiss Federal Office of Public Health, Ed.). Berne: H. Huber.

\end{thebibliography}

\end{document}

