%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{15}

\bibitem{Butler1980} Butler, A. M. (1980). Towards a staffing formula: a staffing system for general and obstetric wards. \textit{Journal of Advanced Nursing}, \textit{73}(3), 8--10.

\end{thebibliography}

\end{document}

