Pianka, E. R. (2000). Evolutionary ecology (6th ed.). Benjamin Cummings.
Cita Chicago Style (17a ed.)Pianka, Eric R. Evolutionary Ecology. 6th ed. San Francisco, Calif: Benjamin Cummings, 2000.
Cita MLA (9a ed.)Pianka, Eric R. Evolutionary Ecology. 6th ed. Benjamin Cummings, 2000.
Precaución: Estas citas no son 100% exactas.