Gribbin, J. R. (1988). The one per cent advantage: The sociobiology of being human. Blackwell.
Lua i Stíl Chicago (17ú heag.)Gribbin, John R. The One Per Cent Advantage: The Sociobiology of Being Human. Oxford: Blackwell, 1988.
Lua MLA (9ú heag.)Gribbin, John R. The One Per Cent Advantage: The Sociobiology of Being Human. Blackwell, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.