Douglas, E. J. (1983). Managerial economics: Theory, practice, and problems (2nd ed.). Prentice-Hall.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रDouglas, Evan J. Managerial Economics: Theory, Practice, and Problems. 2nd ed. Englewood Cliffs, N.J: Prentice-Hall, 1983.
एमएलए (9वां संस्करण) प्रशस्ति पत्रDouglas, Evan J. Managerial Economics: Theory, Practice, and Problems. 2nd ed. Prentice-Hall, 1983.
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