d’Alpoim Guedes, Jade A., Crabtree, Stefani A., Bocinsky, R. Kyle, and Kohler, Timothy A. Twenty-first century approaches to ancient problems: Climate and society. Proceedings of the National Academy of Sciences 113.51 Web. doi:10.1073/pnas.1616188113.

d’Alpoim Guedes, Jade A., Crabtree, Stefani A., Bocinsky, R. Kyle, & Kohler, Timothy A. Twenty-first century approaches to ancient problems: Climate and society. Proceedings of the National Academy of Sciences, 113 (51). https://doi.org/10.1073/pnas.1616188113

d’Alpoim Guedes, Jade A., Crabtree, Stefani A., Bocinsky, R. Kyle, and Kohler, Timothy A. "Twenty-first century approaches to ancient problems: Climate and society". Proceedings of the National Academy of Sciences 113 (51). United States: Proceedings of the National Academy of Sciences. https://doi.org/10.1073/pnas.1616188113. https://par.nsf.gov/biblio/10021607.

@article{osti_10021607,
place = {United States}, title = {Twenty-first century approaches to ancient problems: Climate and society}, url = {https://par.nsf.gov/biblio/10021607}, DOI = {10.1073/pnas.1616188113}, abstractNote = {Not Available}, journal = {Proceedings of the National Academy of Sciences}, volume = {113}, number = {51}, publisher = {Proceedings of the National Academy of Sciences}, author = {d’Alpoim Guedes, Jade A. and Crabtree, Stefani A. and Bocinsky, R. Kyle and Kohler, Timothy A.}, }