Cita APA (7th ed.)

Levi, W. (1974). International politics: Foundations of the system. University of Minnesota Press.

Cita Chicago (17th ed.)

Levi, Werner. International Politics: Foundations of the System. Minneapolis: University of Minnesota Press, 1974.

Cita MLA (9th ed.)

Levi, Werner. International Politics: Foundations of the System. University of Minnesota Press, 1974.