Nickels, W. G. (1987). Understanding business (4th ed.). Times Mirror.
Chicago-čujuhus (17. p.)Nickels, William G. Understanding Business. 4th ed. Toronto: Times Mirror, 1987.
MLA-čujuhus (9. p.)Nickels, William G. Understanding Business. 4th ed. Times Mirror, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.