APA Style

Carr, E, H., Cox, M. (2001). The twenty years' crisis, 1919-1939 : an introduction to the study of international relations . : Palgrave.

MLA Style

Carr, Edward, Hallett., Cox, Michael. "The twenty years' crisis, 1919-1939 : an introduction to the study of international relations". : Palgrave, 2001. Text.