Enger, E. D., Gibson, A. H., & Kormelink, J. (1982). Concepts in biology (3rd ed.). WM.C brown.
Lua i Stíl Chicago (17ú heag.)Enger, Eldon D., Andrew H. Gibson, agus J.Richard Kormelink. Concepts in Biology. 3rd ed. Iowa: WM.C brown, 1982.
Lua MLA (9ú heag.)Enger, Eldon D., et al. Concepts in Biology. 3rd ed. WM.C brown, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.