Byrns, R. (1987). Economics (3rd ed.). Scott,Foresman.
Chicago-čujuhus (17. p.)Byrns, Ralph. Economics. 3rd ed. Illinois: Scott,Foresman, 1987.
MLA-čujuhus (9. p.)Byrns, Ralph. Economics. 3rd ed. Scott,Foresman, 1987.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.