%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Gul_etal2018} {\textquotedblleft}\textit{Theoretical and experimental investigation of conjugation of 1,6-hexanedithiol on MoS$_{2}$}{\textquotedblright}. Gul A, Bacaksiz C, Unsal E, Akbali B, Tomak A, Zareie HM, Sahin H, Materials Research Express \textbf{5}, 036415 (2018).   http://doi.org/10.1088/2053-1591/AAB4A6

\end{thebibliography}

\end{document}

