APA (7th ed.) Citation

Barnett, A. (1961). The human species: A biology of man (Rev. ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Barnett, Anthony. The Human Species: A Biology of Man. Rev. ed. Harmondsworth, Middlesex: Penguin Books, 1961.

MLA (8th ed.) Citation

Barnett, Anthony. The Human Species: A Biology of Man. Rev. ed. Penguin Books, 1961.