Cita APA (7th ed.)
Sunderland, L. D. (1988). Darwin's enigma: Fossils and other problems (Rev.ed.). Master.
Cita Chicago (17th ed.)
Sunderland, Luther D. Darwin's Enigma: Fossils and Other Problems. Rev.ed. Santee: Master, 1988.
Cita MLA (9th ed.)
Sunderland, Luther D. Darwin's Enigma: Fossils and Other Problems. Rev.ed. Master, 1988.
Atenció: Aquestes cites poden no estar 100% correctes.