APA (7th ed.) Citation

(1963). Approaches to the study of international relations. With a forew. by B.V.A. Röling. van Gorcum.

Chicago Style (17th ed.) Citation

Approaches to the Study of International Relations. With a Forew. by B.V.A. Röling. van Gorcum, 1963.

MLA (8th ed.) Citation

Approaches to the Study of International Relations. With a Forew. by B.V.A. Röling. van Gorcum, 1963.