APA-referens (7:e uppl.)

Barnard, J. D. (1962). The macmillan science life series book 4 (rev.ed.). Macmillan.

Chicago-referens (17:e uppl.)

Barnard, John Darrell. The Macmillan Science Life Series Book 4. rev.ed. New York: Macmillan, 1962.

MLA-referens (9:e uppl.)

Barnard, John Darrell. The Macmillan Science Life Series Book 4. rev.ed. Macmillan, 1962.