%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Stranger_etal2007} {\textquotedblleft}\textit{Comparative overview of indoor air quality in Antwerp, Belgium}{\textquotedblright}. Stranger M, Potgieter-Vermaak SS, Van Grieken R, Environment international \textbf{33}, 789 (2007).   http://doi.org/10.1016/J.ENVINT.2007.02.014

\end{thebibliography}

\end{document}

