Duffy, R. (2002). A trip too far: Ecotourism, politics, and exploitation. Earthscan.
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Chicago-čujuhus (17. p.)
Duffy, Rosaleen. A Trip Too Far: Ecotourism, Politics, and Exploitation. London ; Sterling, VA: Earthscan, 2002.
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MLA-čujuhus (9. p.)
Duffy, Rosaleen. A Trip Too Far: Ecotourism, Politics, and Exploitation. Earthscan, 2002.
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