Cita APA (7a ed.)

Friedman, W. (1956). An introduction to world politics (3rd ed.). Macmillan.

Cita Chicago Style (17a ed.)

Friedman, Wolfgang. An Introduction to World Politics. 3rd ed. London: Macmillan, 1956.

Cita MLA (8a ed.)

Friedman, Wolfgang. An Introduction to World Politics. 3rd ed. Macmillan, 1956.