%&LaTeX
\documentclass{article}

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

\begin{document}

\begin{thebibliography}{1}

\bibitem{Nelson_etal2014} Nelson, G. C., Valin, H., Sands, R. D., Havl{\'\i}k, P., Ahammad, H., Deryng, D., et al. (2014). Climate change effects on agriculture: economic responses to biophysical shocks. \textit{Proc. Natl. Acad. Sci. U. S. A.}, \textit{111}(9), 3274--3279.

\end{thebibliography}

\end{document}

