Lewis, D. (2001). The management of non-governmental development organizations: An introduction. Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLewis, David. The Management of Non-governmental Development Organizations: An Introduction. London: Routledge, 2001.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLewis, David. The Management of Non-governmental Development Organizations: An Introduction. Routledge, 2001.
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