Melvin, M. &. B. (2013). Principles of Economics (9th.). Cengage Learning.
Chicago-čujuhus (17. p.)Melvin, Michael & Boyes. Principles of Economics. 9th. Canada: Cengage Learning, 2013.
MLA-čujuhus (9. p.)Melvin, Michael & Boyes. Principles of Economics. 9th. Cengage Learning, 2013.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.