Perkin, H. J. (1996). The Third Revolution: Professional elites in the modern world. Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPerkin, Harold James. The Third Revolution: Professional Elites in the Modern World. London: Routledge, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रPerkin, Harold James. The Third Revolution: Professional Elites in the Modern World. Routledge, 1996.
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