APA (7th ed.) Citation

Oppenheim, L., & Roxburgh, R. F. (1920). International law: A treatise (3d ed.). Longmans, Green and co.

Chicago Style (17th ed.) Citation

Oppenheim, L., and Ronald Francis Roxburgh. International Law: A Treatise. 3d ed. London: Longmans, Green and co, 1920.

MLA (9th ed.) Citation

Oppenheim, L., and Ronald Francis Roxburgh. International Law: A Treatise. 3d ed. Longmans, Green and co, 1920.