%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Aldridge+Measham1999} Aldridge, J., \& Measham, F. (1999). Sildenafil (Viagra) is used as a recreational drug in England. \textit{British medical journal}, \textit{318}(06.03.1999), 669.

\end{thebibliography}

\end{document}

