Oram, R. F. (1976). Biology: Living systems (2a. ed.). Charles E. Merrill.
Lua i Stíl Chicago (17ú heag.)Oram, Raymond F. Biology: Living Systems. 2a. ed. Columbus: Charles E. Merrill, 1976.
Lua MLA (9ú heag.)Oram, Raymond F. Biology: Living Systems. 2a. ed. Charles E. Merrill, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.