Gill, R. T. (1978). Economics: A text with readings. Goodyear.
Tohutoru Kātū Chicago (17th ed.)Gill, Richard T. Economics: A Text with Readings. Santa Monica.: Goodyear, 1978.
Tohutoro MLA (9th ed.)Gill, Richard T. Economics: A Text with Readings. Goodyear, 1978.
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