Kocka, J. (1980). White collar workers in America, 1890-1940: A social-political history in international perspective. Sage Publications.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKocka, Jurgen. White Collar Workers in America, 1890-1940: A Social-political History in International Perspective. London ; Beverly Hills: Sage Publications, 1980.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKocka, Jurgen. White Collar Workers in America, 1890-1940: A Social-political History in International Perspective. Sage Publications, 1980.
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