APA (7th ed.) Citation

Vattel, E. d., Whatmore, R., & Kapossy, B. (2008). The Law of Nations.

Chicago Style (17th ed.) Citation

Vattel, Emer de, Richard Whatmore, and Bela Kapossy. The Law of Nations. 2008.

MLA (9th ed.) Citation

Vattel, Emer de, et al. The Law of Nations. 2008.