Cita APA (7a ed.)

Carr, E. H. (1946). The twenty years' crisis: 1919-1939 An Introduction to the study of International Realtions (2 edició.). Macmillan & Co.

Cita Chicago Style (17a ed.)

Carr, Edward Hallett. The Twenty Years' Crisis: 1919-1939 An Introduction to the Study of International Realtions. 2 edició. London: Macmillan & Co, 1946.

Cita MLA (9a ed.)

Carr, Edward Hallett. The Twenty Years' Crisis: 1919-1939 An Introduction to the Study of International Realtions. 2 edició. Macmillan & Co, 1946.