APA-referens (7:e uppl.)

Howells, W. W. (1967). Mankind in the making: The story of human evolution (Revised edition.). Doubleday.

Chicago-referens (17:e uppl.)

Howells, William W. Mankind in the Making: The Story of Human Evolution. Revised edition. Garden City, New York: Doubleday, 1967.

MLA-referens (9:e uppl.)

Howells, William W. Mankind in the Making: The Story of Human Evolution. Revised edition. Doubleday, 1967.