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Weiler B, Black R. Tour Guiding Research: Insights, Issues and Implications. Vol 62. 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. Vol Aspects of tourism. Channel View Publications; 2014.
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Benfield R. Garden Tourism. CABI; 2013.
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Buckley, Ralf. Environmental Impacts of Ecotourism. Vol Ecotourism book series. CABI publishing; 2004.
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Buckley R. Environmental Impacts of Ecotourism. Vol 2. 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., Fenner Conference on Nature Tourism and the Environment. Nature-Based Tourism, Environment and Land Management. Vol Ecotourism book series. CABI; 2003.
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Duffy, Rosaleen. A Trip Too Far: Ecotourism, Politics, and Exploitation. Earthscan Publications; 2002.
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Higginbottom, Karen. Wildlife Tourism: Impacts, Management and Planning. Common Ground; 2004.
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Higham, James E. S. Critical Issues in Ecotourism: Understanding a Complex Tourism Phenomenon. Butterworth-Heinemann; 2007.
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Higham, James E. S. Critical Issues in Ecotourism: Understanding a Complex Tourism Phenomenon. 1st ed. 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. 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. Routledge; 1999.
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Orams, Mark. Marine Tourism: Development, Impacts and Management. 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. Vol Aspects of tourism. Channel View; 2005.
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Wearing, Stephen, Neil, John. Ecotourism: Impacts, Potentials, and Possibilities. 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. Vol Tourism and the environment. WTO; 1992.
