Samuelson, P. A. (1985). Economics (12th.). McGraw-Hill.
Tohutoru Kātū Chicago (17th ed.)Samuelson, Paul A. Economics. 12th. Singapore: McGraw-Hill, 1985.
Tohutoro MLA (9th ed.)Samuelson, Paul A. Economics. 12th. McGraw-Hill, 1985.
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