Cita APA (7a ed.)

Oppenheim, L., & Roxburgh, R. (1955). International law: A treatise. Longmas.

Cita Chicago Style (17a ed.)

Oppenheim, L., y Ronald Roxburgh. International Law: A Treatise. London: Longmas, 1955.

Cita MLA (9a ed.)

Oppenheim, L., y Ronald Roxburgh. International Law: A Treatise. Longmas, 1955.