Barkley, P. W. (1977). Economics: The way we choose. Harcourt Brace Jovanovich.
Tohutoru Kātū Chicago (17th ed.)Barkley, Paul W. Economics: The Way We Choose. New York: Harcourt Brace Jovanovich, 1977.
Tohutoro MLA (9th ed.)Barkley, Paul W. Economics: The Way We Choose. Harcourt Brace Jovanovich, 1977.
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