APA (7th ed.) Citation

Gochberg, D. S. (1980). The Twentieth century. Harcourt Brace Jovanovich.

Chicago Style (17th ed.) Citation

Gochberg, Donald S. The Twentieth Century. New York: Harcourt Brace Jovanovich, 1980.

MLA (9th ed.) Citation

Gochberg, Donald S. The Twentieth Century. Harcourt Brace Jovanovich, 1980.