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Weiler B, Black R. Tour guiding research: insights, issues and implications. Bristol: : Channel View Publications 2015. https://ebookcentral.proquest.com/lib/bournemouth-ebooks/detail.action?docID=1790334
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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, Ralf. Environmental impacts of ecotourism. Wallingford: : CABI publishing 2004.
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Buckley R. Environmental impacts of ecotourism. Wallingford, Oxon, UK: : CABI Pub 2004. https://ebookcentral.proquest.com/lib/bournemouth-ebooks/detail.action?docID=297545
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Buckley, Ralf C., Pickering, C., Weaver, David B., et al. Nature-based tourism, environment and land management. Wallingford: : CABI 2003.
7
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. 1st ed. Amsterdam: : Butterworth-Heinemann 2007. 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? 2nd ed. Washington, D.C.: : Island Press 2008. 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. London: : Routledge 2002. 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.