%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Botha_etal1992} Botha, G. R., Sanderson, R. D., \& Buckley, C. A. (1992). Brief Historical Review of Membrane-development and Membrane Applications in Waste-water Treatment in Southern Africa. \textit{Water Sci. Technol.}, \textit{25}(10), 1--4.

\end{thebibliography}

\end{document}

