%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Bruederlin2003} Br{\"u}derlin, R. (2003). Aufputschen, ant{\"o}rnen, abregen. \textit{Facts}, (31), 32--39.

\end{thebibliography}

\end{document}

