Wallece, R. A. (1981). Biology The World Of Life (3 ed.). s.n.
Lua i Stíl Chicago (17ú heag.)Wallece, Robert A. Biology The World Of Life. 3 ed. Dallas: s.n, 1981.
Lua MLA (9ú heag.)Wallece, Robert A. Biology The World Of Life. 3 ed. s.n, 1981.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.