%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Andreae_etal1986} {\textquotedblleft}\textit{Internal mixture of sea salt, silicates, and excess sulfate in marine aerosols}{\textquotedblright}. Andreae MO, Charlson RJ, Bruynseels F, Storms H, Van Grieken R, Maenhaut W, Science \textbf{232}, 1620 (1986).   http://doi.org/10.1126/SCIENCE.232.4758.1620

\end{thebibliography}

\end{document}

