%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Zollner2013} Zollner, P. (2013). \textit{Pagan metal in Skandinavien und Deutschland}. M{\"u}nchen: Grin Verlag.

\end{thebibliography}

\end{document}

