Ulmer, M. (1965). Economics: Theory and Practice (2nd ed.). Houghton Mifflin.
Čikaški stil citiranjaUlmer, Melville. Economics: Theory and Practice. 2nd ed. Boston: Houghton Mifflin, 1965.
MLA način citiranjaUlmer, Melville. Economics: Theory and Practice. 2nd ed. Houghton Mifflin, 1965.
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