Clutton-Brock, T. H. (1991). The evolution of parental care. Princeton University Press.
Lua i Stíl Chicago (17ú heag.)Clutton-Brock, T. H. The Evolution of Parental Care. Princeton, N.J.: Princeton University Press, 1991.
Lua MLA (9ú heag.)Clutton-Brock, T. H. The Evolution of Parental Care. Princeton University Press, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.