%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Klock_etal2000} Klock, H., K{\"u}lls, C., \& Udluft, P. (2000). Estimation of relative recharge values for the northern Kalahari catchment, Namibia. \textit{Journal of African Earth Sciences}, \textit{30}(4), 47--48.

\end{thebibliography}

\end{document}

