Enger, E. D., Gibson, A. H., & Kormelink, J. (1982). Concepts in biology (3rd ed.). WM.C brown.
Chicago-čujuhus (17. p.)Enger, Eldon D., Andrew H. Gibson, juo J.Richard Kormelink. Concepts in Biology. 3rd ed. Iowa: WM.C brown, 1982.
MLA-čujuhus (9. p.)Enger, Eldon D., et al. Concepts in Biology. 3rd ed. WM.C brown, 1982.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.