APA (7th ed.) Citation

Carr, E. H. (1946). The twenty years' crisis, 1919-1939: An introduction to the study of international relations (2nd ed.). Macmillan.

Chicago Style (17th ed.) Citation

Carr, Edward Hallett. The Twenty Years' Crisis, 1919-1939: An Introduction to the Study of International Relations. 2nd ed. London: Macmillan, 1946.

MLA (8th ed.) Citation

Carr, Edward Hallett. The Twenty Years' Crisis, 1919-1939: An Introduction to the Study of International Relations. 2nd ed. Macmillan, 1946.