%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Hellar-Kihampa_etal2014} {\textquotedblleft}\textit{Concentration profiles of metal contaminants in fluvial sediments of a rural-urban drainage basin in Tanzania}{\textquotedblright}. Hellar-Kihampa H, Potgieter-Vermaak S, De Wael K, Lugwisha E, van Espen P, Van Grieken R, International journal of environmental analytical chemistry \textbf{94}, 77 (2014).   http://doi.org/10.1080/03067319.2013.791976

\end{thebibliography}

\end{document}

