APA (7th ed.) Citation

Hayes, P. M. (1978). The twentieth century 1880-1939.

Chicago Style (17th ed.) Citation

Hayes, Paul Martin. The Twentieth Century 1880-1939. 1978.

MLA (9th ed.) Citation

Hayes, Paul Martin. The Twentieth Century 1880-1939. 1978.

Warning: These citations may not always be 100% accurate.