APA (7th ed.) Citation

Boak, A. E. R. (1951). The growth of Western civilization (4th ed.). Appleton-Century-Crofts.

Chicago Style (17th ed.) Citation

Boak, Arthur Edward Romilly. The Growth of Western Civilization. 4th ed. New York: Appleton-Century-Crofts, 1951.

MLA (9th ed.) Citation

Boak, Arthur Edward Romilly. The Growth of Western Civilization. 4th ed. Appleton-Century-Crofts, 1951.