2Pamela A Wight. North American Ecotourists: Market profile and trip characteristics. Journal of travel research, summer, 1996:2 - 10.
3Paul F J Eagles. The Travel Motivations of Canadian Ecotourists, Journal of travel Research, fall, 1992:3 - 7.
4Meric, Havva J , Hunt, Judith. Ecotourist' Motivational and Demographic Characteristics: A Case Of North Carolina Travelers Journal of travel research, March 1, 1998, Vol. 36, Issue 4.