%&LaTeX
\documentclass{article}

\usepackage[latin1]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{textcomp}

\begin{document}

\begin{thebibliography}{10}

\bibitem{Schmieds1977} Schmieds, U. (1977). \textit{{\"O}kologische Studien an Fischen des Schlierenseebaches}. Diploma thesis, Christian-Albrechts-Universit{\"a}t, Kiel.

\end{thebibliography}

\end{document}

