Tohutoro APA (7th ed.)
Willis, J. F., & Primack, M. L. (1977). Explorations in economics. Houghton Mifflin.
Tohutoru Kātū Chicago (17th ed.)
Willis, James Frederick, me Martin L. Primack. Explorations in Economics. Boston: Houghton Mifflin, 1977.
Tohutoro MLA (9th ed.)
Willis, James Frederick, me Martin L. Primack. Explorations in Economics. Houghton Mifflin, 1977.
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