Arnold, R. A. (2020). Economics (13th ed.). Cengage Learning.
Chicago-čujuhus (17. p.)Arnold, Roger A. Economics. 13th ed. Boston, MA: Cengage Learning, 2020.
MLA-čujuhus (9. p.)Arnold, Roger A. Economics. 13th ed. Cengage Learning, 2020.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.