Addison, J. T., & Siebert, W. S. (1993). Social engineering in the European community: The social charter, Maastricht and beyond. Institute of Economic Affairs.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रAddison, John T., और W. Stanley Siebert. Social Engineering in the European Community: The Social Charter, Maastricht and Beyond. London: Institute of Economic Affairs, 1993.
एमएलए (9वां संस्करण) प्रशस्ति पत्रAddison, John T., और W. Stanley Siebert. Social Engineering in the European Community: The Social Charter, Maastricht and Beyond. Institute of Economic Affairs, 1993.
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