APA (7th ed.) Citation

Roberts, A., Stephan, P. B., Verdier, P., & Versteeg, M. (2018). Comparative international law. Oxford University Press. https://doi.org/10.1093/oso/9780190697570.001.0001

Chicago Style (17th ed.) Citation

Roberts, Anthea, Paul B. Stephan, Pierre-Hugues Verdier, and Mila Versteeg. Comparative International Law. New York: Oxford University Press, 2018. https://doi.org/10.1093/oso/9780190697570.001.0001.

MLA (9th ed.) Citation

Roberts, Anthea, et al. Comparative International Law. Oxford University Press, 2018. https://doi.org/10.1093/oso/9780190697570.001.0001.