%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{VanBeusekom+Iguchi2001} Van Beusekom, I., \& Iguchi, M. Y. (2001). \textit{A review of recent advances in knowledge about methadone maintenance treatment}. Cambridge: RAND Europe.

\end{thebibliography}

\end{document}

