Oram, R. F. (1973). Biology: Living systems (Teacher's annotated ed., including behavioral objectives.). Merrill.
Lua i Stíl Chicago (17ú heag.)Oram, Raymond F. Biology: Living Systems. Teacher's annotated ed., including behavioral objectives. Columbus, Ohio: Merrill, 1973.
Lua MLA (8ú heag.)Oram, Raymond F. Biology: Living Systems. Teacher's annotated ed., including behavioral objectives. Merrill, 1973.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.