Weaver, D. B. (1998). Ecotourism in the less developed world David B. Weaver. CAB International.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWeaver, David B. Ecotourism in the Less Developed World David B. Weaver. CAB International, 1998.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWeaver, David B. Ecotourism in the Less Developed World David B. Weaver. CAB International, 1998.
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