%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Kellerhals+Gervasoni1999} Kellerhals, C., \& Gervasoni, J. - P. (1999). \textit{Evaluation des differents modes de d{\'e}l{\'e}gation adopt{\'e}es par l{\textquoteright}office f{\'e}d{\'e}ral de la sant{\'e} publique (OFSP)}. rds, 42. Lausanne: Institut universitaire de m{\'e}decine sociale et pr{\'e}ventive (IUMSP).

\end{thebibliography}

\end{document}

