APA (7th ed.) Citation

Barnett, S. A. (1961). The human species: A biology of man (Revised edition.). Penguin Books.

Chicago Style (17th ed.) Citation

Barnett, Samuel Anthony. The Human Species: A Biology of Man. Revised edition. Harmondsworth: Penguin Books, 1961.

MLA (9th ed.) Citation

Barnett, Samuel Anthony. The Human Species: A Biology of Man. Revised edition. Penguin Books, 1961.

Warning: These citations may not always be 100% accurate.