1. The recreational cost of coral bleaching: a stated preference study of international tourists;Andersson,2003
2. Arin, T., 1988. Estimating the Tourist Demand for International Dive Vacations: A Pretest. Master of Science Thesis, Nicholas School of the Environment, Duke University.
3. Preferences for Outdoor Recreation: The Case of Pulau Payar Visitors;Ayob,2000
4. Recreation Values of Tourists for Bunaken National Marine Park, North Sulawesi;BAPPENAS (National Development Planning Agency Republic of Indonesia), Ministry of Forestry, USAID,1996
5. Economic factors and valuation of tropical coastal resources;Barton,1994