Hopkins, J. W. (1989). The eradication of smallpox: Organizational learning and innovation in international health. Westview Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रHopkins, Jack W. The Eradication of Smallpox: Organizational Learning and Innovation in International Health. Boulder, Colo.: Westview Press, 1989.
एमएलए (8वां संस्करण) प्रशस्ति पत्रHopkins, Jack W. The Eradication of Smallpox: Organizational Learning and Innovation in International Health. Westview Press, 1989.
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