%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Hoffman_etal2014} {\textquotedblleft}\textit{Mechanism of Nitrogen Fixation by Nitrogenase: The Next Stage}{\textquotedblright}. Hoffman BM, Lukoyanov D, Yang Z-Y, Dean DR, Seefeldt LC, Chemical Reviews \textbf{114}, 4041 (2014).   http://doi.org/10.1021/cr400641x

\end{thebibliography}

\end{document}

