Bingham, R. C., & Pope, W. H. (1993). Economic concepts: A programmed approach (10th ed. / revised by William Henry Pope.). McGraw-Hill.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBingham, Robert C., और W. H. Pope. Economic Concepts: A Programmed Approach. 10th ed. / revised by William Henry Pope. New York: McGraw-Hill, 1993.
एमएलए (8वां संस्करण) प्रशस्ति पत्रBingham, Robert C., और W. H. Pope. Economic Concepts: A Programmed Approach. 10th ed. / revised by William Henry Pope. McGraw-Hill, 1993.
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