Mortenson, W. P., Krider, D. T., & Sampson, R. J. (1969). Understanding our economy: Analysis, issues, principles (Teacher's ed.). Houghton Mifflin.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMortenson, W. P., Donald T. Krider, और Roy J. Sampson. Understanding Our Economy: Analysis, Issues, Principles. Teacher's ed. New York: Houghton Mifflin, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रMortenson, W. P., et al. Understanding Our Economy: Analysis, Issues, Principles. Teacher's ed. Houghton Mifflin, 1969.
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