Simpson, G. G. (1965). Life: An introduction to biology (2nd ed.). Harcourt, Brace and World.
Lua i Stíl Chicago (17ú heag.)Simpson, George Gaylord. Life: An Introduction to Biology. 2nd ed. New York: Harcourt, Brace and World, 1965.
Lua MLA (9ú heag.)Simpson, George Gaylord. Life: An Introduction to Biology. 2nd ed. Harcourt, Brace and World, 1965.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.