%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{5}

\bibitem{Ensan2011} Ensan, A., Bagheri, E., Asadi, M., Gasevic, D., \& Biletskiy, Y. (2011). , Goal-Oriented Test Case Selection and Prioritization for Product Line Feature Models. In \textit{In Proceedings of Eighth International Conference on Information Technology} (pp. 291--298). Las Vegas, USA: IEEE.

\end{thebibliography}

\end{document}

