Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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