%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Mezzera2009} Mezzera, M. (2009). \textit{Kein Alkohol f{\"u}r Minderj{\"a}hrige : f{\"u}nf Berner Gemeinden handeln}. Bern: Berner Gesundheit (BeGes).

\end{thebibliography}

\end{document}

