Simmons, G. S. (2004). What Darwin didn't know. Harvest House.
Cita Chicago Style (17a ed.)Simmons, Geoffrey S. What Darwin Didn't Know. Eugene (Oregón): Harvest House, 2004.
Cita MLA (9a ed.)Simmons, Geoffrey S. What Darwin Didn't Know. Harvest House, 2004.
Precaución: Estas citas no son 100% exactas.