Cita APA (7a ed.)

Northedge, F. S. (1976). The international political system (1st published.). Faber and Faber.

Cita Chicago Style (17a ed.)

Northedge, F. S. The International Political System. 1st published. London: Faber and Faber, 1976.

Cita MLA (9a ed.)

Northedge, F. S. The International Political System. 1st published. Faber and Faber, 1976.