Willetts, P. (1996). The conscience of the world: The influence of non-governmental organisations in the UN system. Brookings Institution for the David Davies Memorial Institute of International Studies, London.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWilletts, Peter. The Conscience of the World: The Influence of Non-governmental Organisations in the UN System. Washington, DC: Brookings Institution for the David Davies Memorial Institute of International Studies, London, 1996.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWilletts, Peter. The Conscience of the World: The Influence of Non-governmental Organisations in the UN System. Brookings Institution for the David Davies Memorial Institute of International Studies, London, 1996.
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