Cita APA (7th ed.)

LEVI, W. (1991). Contemporary international law: A concise introduction. Westview Press.

Cita Chicago (17th ed.)

LEVI, Werner. Contemporary International Law: A Concise Introduction. Boulder: Westview Press, 1991.

Cita MLA (9th ed.)

LEVI, Werner. Contemporary International Law: A Concise Introduction. Westview Press, 1991.