Sowell Thomas. (1991). Economics Analysis and Issuses (In lần thứ 1.). American: Scott, Foresman and Company.
Styl ChicagoSowell Thomas. Economics Analysis and Issuses. In lần thứ 1. American: Scott, Foresman and Company, 1991.
Citace podle MLASowell Thomas. Economics Analysis and Issuses. In lần thứ 1. American: Scott, Foresman and Company, 1991.
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