Johnson, L. A. (1969). Employing the hard-core unemployed. American Management Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रJohnson, Lawrence Alexander. Employing the Hard-core Unemployed. [New York]: American Management Association, 1969.
एमएलए (8वां संस्करण) प्रशस्ति पत्रJohnson, Lawrence Alexander. Employing the Hard-core Unemployed. American Management Association, 1969.
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