APA

Hallett Carr E., . (1964). The twenty years crisis 1919-1939 / Edward Hallett Carr. New York: Harper-Row.

Chicago

Hallett Carr Edward, . 1964. The twenty years crisis 1919-1939 / Edward Hallett Carr. New York: Harper-Row.

Harvard

Hallett Carr E., . (1964). The twenty years crisis 1919-1939 / Edward Hallett Carr. New York: Harper-Row.

MLA

Hallett Carr Edward, . The twenty years crisis 1919-1939 / Edward Hallett Carr. New York: Harper-Row. 1964.