APA-referens (7:e uppl.)

Sunderland, L. D. (1988). Darwin's enigma: Fossils and other problems (Rev.ed.). Master.

Chicago-referens (17:e uppl.)

Sunderland, Luther D. Darwin's Enigma: Fossils and Other Problems. Rev.ed. Santee: Master, 1988.

MLA-referens (9:e uppl.)

Sunderland, Luther D. Darwin's Enigma: Fossils and Other Problems. Rev.ed. Master, 1988.