Wilson, E. O. (1978). Life on earth (2nd ed.). Sinauer Associates.
Lua i Stíl Chicago (17ú heag.)Wilson, Edward O. Life on Earth. 2nd ed. Sunderland, MA: Sinauer Associates, 1978.
Lua MLA (9ú heag.)Wilson, Edward O. Life on Earth. 2nd ed. Sinauer Associates, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.