1. Herz M. Cruise control. A report on how cruise ships affect the marine environment on behalf of The Ocean Conservancy; 2002.
2. White G. Personal communication. Lloyds Fairplay; 2005.
3. Sweeting JEN, Wayne SL. A shifting tide. Environmental challenges and cruise industry responses. Interim Summary Report from the Centre for Environmental Leadership in Business; 2003.
4. Environmentally sustainable cruise tourism: a reality check;Johnson;Marine Policy,2002
5. UNEP. Industry as a partner for sustainable development: tourism. A report prepared by World Tourism Council, International Hotel and Restaurant Association, International Federation of Tour Operators and the International Council of Cruise Lines; 2002.