Harison, B. (1989). Introductory economics (1st edition.). Macmillan.
Tohutoru Kātū Chicago (17th ed.)Harison, Barry. Introductory Economics. 1st edition. Cambridge: Macmillan, 1989.
Tohutoro MLA (9th ed.)Harison, Barry. Introductory Economics. 1st edition. Macmillan, 1989.
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