APA Edition Citation

Carr, E. H. (1939). The twenty year's crisis 1919-1939: An introduction to the study of international relations.

Chicago Edition Citation

Carr, E H. The Twenty Year's Crisis 1919-1939: An Introduction to the Study of International Relations. London, Macmillan, 1939.

MLA Edition Citation

Carr, E H. The Twenty Year's Crisis 1919-1939: An Introduction to the Study of International Relations. 1939.