APA (7th ed.) Citation

Slovic, P., Västfjäll, D., Erlandsson, A., & Gregory, R. (2017). Iconic photographs and the ebb and flow of empathic response to humanitarian disasters. Proceedings of the National Academy of Sciences - PNAS, 114(4), 640-644. https://doi.org/10.1073/pnas.1613977114

Chicago Style (17th ed.) Citation

Slovic, Paul, Daniel Västfjäll, Arvid Erlandsson, and Robin Gregory. "Iconic Photographs and the Ebb and Flow of Empathic Response to Humanitarian Disasters." Proceedings of the National Academy of Sciences - PNAS 114, no. 4 (2017): 640-644. https://doi.org/10.1073/pnas.1613977114.

MLA (9th ed.) Citation

Slovic, Paul, et al. "Iconic Photographs and the Ebb and Flow of Empathic Response to Humanitarian Disasters." Proceedings of the National Academy of Sciences - PNAS, vol. 114, no. 4, 2017, pp. 640-644, https://doi.org/10.1073/pnas.1613977114.