Oram, R. F. (1989). Biology, living systems (6th ed., Teacher annotated ed.). Merrill Pub. Co..
Lua i Stíl Chicago (17ú heag.)Oram, Raymond F. Biology, Living Systems. 6th ed., Teacher annotated ed. Columbus, Ohio: Merrill Pub. Co., 1989.
Lua MLA (8ú heag.)Oram, Raymond F. Biology, Living Systems. 6th ed., Teacher annotated ed. Merrill Pub. Co., 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.