%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{15}

\bibitem{Hamer+McCallin2006} Hamer, H. P., \& McCallin, A. (2006). Cardiac pain or panic disorder? Managing uncertainty in the emergency department. \textit{Nursing \& Health Sciences}, \textit{8}(4), 224--230.

\end{thebibliography}

\end{document}

