APA (7th ed.) Citation

Boak, A. E. R. (1963). The history of our world. Houghton Mifflin.

Chicago Style (17th ed.) Citation

Boak, Arthur Edward Romilly. The History of Our World. Boston: Houghton Mifflin, 1963.

MLA (9th ed.) Citation

Boak, Arthur Edward Romilly. The History of Our World. Houghton Mifflin, 1963.