Gaya APA

Ecotourism : principles, practices and policies for sustainability / Megan Epler Wood. (2002). : Burlington, Vt. : International Ecotourism Society : UNEP.

Gaya MLA

Ecotourism : principles, practices and policies for sustainability / Megan Epler Wood. . : Burlington, Vt. : International Ecotourism Society : UNEP, 2002. Text.