Levitan, S. A., Mangum, G. L., & Marshall, F. R. (1976). Human resources and labor markets: Labor and manpower in the American economy (2nd ed.). Harper & Row.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLevitan, Sar A., Garth L. Mangum, और F. Ray Marshall. Human Resources and Labor Markets: Labor and Manpower in the American Economy. 2nd ed. New York: Harper & Row, 1976.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLevitan, Sar A., et al. Human Resources and Labor Markets: Labor and Manpower in the American Economy. 2nd ed. Harper & Row, 1976.
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