(1980). BUSINESS ECONOMICS: Made Simple. [s.n].
Chicago-čujuhus (17. p.)BUSINESS ECONOMICS: Made Simple. [s.i]: [s.n], 1980.
MLA-čujuhus (9. p.)BUSINESS ECONOMICS: Made Simple. [s.n], 1980.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.