APA (7th ed.) Citation

Mayr, E. (1971). Populations, species, and evolution: An abridgment of animal species and evolution (2.print.). Belknap Press.

Chicago Style (17th ed.) Citation

Mayr, Ernst. Populations, Species, and Evolution: An Abridgment of Animal Species and Evolution. 2.print. Cambridge: Belknap Press, 1971.

MLA (9th ed.) Citation

Mayr, Ernst. Populations, Species, and Evolution: An Abridgment of Animal Species and Evolution. 2.print. Belknap Press, 1971.