%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Yeh_etal2006} Yeh, M., Lin, Y., \& Chang, L. (2006). Designing an optimal multivariate geostatistical groundwater quality monitoring network using factorial kriging and genetic algorithms. \textit{Environ. Geol.}, \textit{50}(1), 101--121.

\end{thebibliography}

\end{document}

