APA-referens (7:e uppl.)

Howells, W. W. (1959). Mankind in the making: The story of human evolution. Doubleday.

Chicago-referens (17:e uppl.)

Howells, William White. Mankind in the Making: The Story of Human Evolution. Garden City, NY: Doubleday, 1959.

MLA-referens (9:e uppl.)

Howells, William White. Mankind in the Making: The Story of Human Evolution. Doubleday, 1959.