%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Rosa1998} Rosa, C. (1998, 20.02.1998). Goldene Zitrone 1998 : Preis f{\"u}r die st{\"a}dtische Drogen-Task-Force. \textit{Berner Zeitung}, 28.

\end{thebibliography}

\end{document}

