Mader, S. S. (1990). Biology (3rd ed.). WCB.
Lua i Stíl Chicago (17ú heag.)Mader, Sylvia S. Biology. 3rd ed. Boulevard: WCB, 1990.
Lua MLA (9ú heag.)Mader, Sylvia S. Biology. 3rd ed. WCB, 1990.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.