Cita APA (7th ed.)

Kelsen, H. (1967). Principles of international law (2a. ed.). Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Kelsen, Hans. Principles of International Law. 2a. ed. Nueva York: Holt, Rinehart and Winston, 1967.

Cita MLA (9th ed.)

Kelsen, Hans. Principles of International Law. 2a. ed. Holt, Rinehart and Winston, 1967.