Walton, G. M., & Wykoff, F. C. (1991). Understanding economics today (3rd ed.). IRWIN.
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Chicago-čujuhus (17. p.)
Walton, Gary M., juo Frank C. Wykoff. Understanding Economics Today. 3rd ed. Illinois: IRWIN, 1991.
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MLA-čujuhus (9. p.)
Walton, Gary M., juo Frank C. Wykoff. Understanding Economics Today. 3rd ed. IRWIN, 1991.
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