Hirsch, B. T. (1991). Labour unions and the economic performance of firms. W.E. Upjohn Institute for Employment Research.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHirsch, Barry T. Labour Unions and the Economic Performance of Firms. Kalamazoo, Mich: W.E. Upjohn Institute for Employment Research, 1991.
एमएलए (9वां संस्करण) प्रशस्ति पत्रHirsch, Barry T. Labour Unions and the Economic Performance of Firms. W.E. Upjohn Institute for Employment Research, 1991.
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