APA (7th ed.) Zitazioa

Sprout, H., & Sprout, M. (1965). The ecological perspective on human affairs with special reference to international politics. Princeton University.

Chicago Style (17th ed.) Zitazioa

Sprout, Harold, eta Margaret Sprout. The Ecological Perspective on Human Affairs with Special Reference to International Politics. Princeton: Princeton University, 1965.

MLA (9th ed.) Zitazioa

Sprout, Harold, eta Margaret Sprout. The Ecological Perspective on Human Affairs with Special Reference to International Politics. Princeton University, 1965.