%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{various2007} various. (2007). St{\"o}rung nach Volkow et al. : Neuronale Netzwerke. In \textit{Suchttherapietage Hamburg} (6). Hamburg.

\end{thebibliography}

\end{document}

