Cita APA (7a ed.)

Carr, E. H. (1958). The twenty years' crisis 1919 - 1939: An introduction to the study of international relations. Macmillan and Co.

Cita Chicago Style (17a ed.)

Carr, Edward Hallett. The Twenty Years' Crisis 1919 - 1939: An Introduction to the Study of International Relations. London [etc.]: Macmillan and Co, 1958.

Cita MLA (9a ed.)

Carr, Edward Hallett. The Twenty Years' Crisis 1919 - 1939: An Introduction to the Study of International Relations. Macmillan and Co, 1958.