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Weiler B, Black R. Tour guiding research: insights, issues and implications. Bristol: Channel View Publications; 2014.
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Benfield R. Garden tourism. Wallingford: CABI; 2013.
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Buckley R. Environmental impacts of ecotourism [Internet]. Wallingford, Oxon, UK: CABI Pub; 2004. Available from: https://ebookcentral.proquest.com/lib/bournemouth-ebooks/detail.action?docID=297545
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Buckley, Ralf C., Pickering, C., Weaver, David B., Fenner Conference on Nature Tourism and the Environment. Nature-based tourism, environment and land management. Wallingford: CABI; 2003.
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Duffy, Rosaleen. A trip too far: ecotourism, politics, and exploitation. London: Earthscan Publications; 2002.
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Higginbottom, Karen. Wildlife tourism: impacts, management and planning. Altona, Vic: Common Ground; 2004.
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Higham, James E. S. Critical issues in ecotourism: understanding a complex tourism phenomenon. Amsterdam: Butterworth-Heinemann; 2007.
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Higham, James E. S. Critical issues in ecotourism: understanding a complex tourism phenomenon [Internet]. 1st ed. Amsterdam: Butterworth-Heinemann; 2007. Available from: http://search.ebscohost.com/login.aspx?authtype=ip,shib&custid=s7547708&direct=true&db=nlebk&db=nlabk&site=ehost-live&scope=site&AN=196292
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Honey, Martha. Ecotourism and sustainable development: who owns paradise? [Internet]. 2nd ed. Washington, D.C.: Island Press; 2008. Available from: http://search.ebscohost.com/login.aspx?authtype=ip,shib&custid=s7547708&direct=true&db=nlebk&db=nlabk&site=ehost-live&scope=site&AN=399207
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Orams, Mark. Marine tourism: development, impacts and management. London: Routledge; 1999.
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Orams, Mark. Marine tourism: development, impacts and management [Internet]. London: Routledge; 2002. Available from: http://search.ebscohost.com/login.aspx?authtype=ip,shib&custid=s7547708&direct=true&db=nlebk&db=nlabk&site=ehost-live&scope=site&AN=70436
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Newsome, David, Dowling, Ross Kingston, Moore, Susan A. Wildlife tourism. Clevedon: Channel View; 2005.
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Wearing, Stephen, Neil, John. Ecotourism: impacts, potentials, and possibilities. Oxford: Butterworth-Heinemann; 1999.
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World Tourism Organization, Industry and Environment Programme Activity Centre, United Nations. Guidelines: development of national parks and protected areas for tourism. Madrid: WTO; 1992.
