McKean, J. R., & Wykstra, R. A. (1971). Readings in introductory economics. Harper & Row.
Chicago Style aipamenaMcKean, John R., and Ronald A. Wykstra. Readings in Introductory Economics. New York: Harper & Row, 1971.
MLA aipamenaMcKean, John R., and Ronald A. Wykstra. Readings in Introductory Economics. Harper & Row, 1971.
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