APA (7th ed.) Citation

Carr, E. H. (1964). The twenty years' crisis 1919 - 1939: An introduction to the study of international relations. Harper & Row.

Chicago Style (17th ed.) Citation

Carr, Edward Hallett. The Twenty Years' Crisis 1919 - 1939: An Introduction to the Study of International Relations. New York: Harper & Row, 1964.

MLA (9th ed.) Citation

Carr, Edward Hallett. The Twenty Years' Crisis 1919 - 1939: An Introduction to the Study of International Relations. Harper & Row, 1964.