APA-viite (7. p.)
ebrary, Inc, Kirstges, T., & L?uck, M. (2003). Global ecotourism policies and case studies: Perspectives and constraints. Channel View Publications.
Chicago-viite (17. p.)
ebrary, Inc, Torsten Kirstges, ja Michael L?uck. Global Ecotourism Policies and Case Studies: Perspectives and Constraints. Clevedon ; Buffalo: Channel View Publications, 2003.
MLA-viite (9. p.)
ebrary, Inc, et al. Global Ecotourism Policies and Case Studies: Perspectives and Constraints. Channel View Publications, 2003.
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