Smith, R. L. (1995). Ecology and field biology (5th ed.). Harper Collins.
Chicago-čujuhus (17. p.)Smith, Robert Leo. Ecology and Field Biology. 5th ed. New York: Harper Collins, 1995.
MLA-čujuhus (9. p.)Smith, Robert Leo. Ecology and Field Biology. 5th ed. Harper Collins, 1995.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.