Enger, E. D., & Kormelink, J. R. (1991). Concepts in biology (6th ed.). WCB.
Chicago-čujuhus (17. p.)Enger, Eldon D., juo J. Richard Kormelink. Concepts in Biology. 6th ed. Boulevard: WCB, 1991.
MLA-čujuhus (9. p.)Enger, Eldon D., juo J. Richard Kormelink. Concepts in Biology. 6th ed. WCB, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.