Yee, J. G. (1992). Ecotourism market survey: A survey of North American ecotourism tour operators. Intelligence Centre, Pacific Asia Travel Association.
Čikaški stil citiranja (17. izdanje)Yee, Jordan G. Ecotourism Market Survey: A Survey of North American Ecotourism Tour Operators. San Francisco, CA: Intelligence Centre, Pacific Asia Travel Association, 1992.
MLA način citiranja (8. izdanje)Yee, Jordan G. Ecotourism Market Survey: A Survey of North American Ecotourism Tour Operators. Intelligence Centre, Pacific Asia Travel Association, 1992.
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