1[1]Karl P. Sauvant and Padma Mallampally, Transnational Corporations in Services, pl, United Nations Library on Transnational Corporations Volume 12, 1993, London and New York.
2[2]J. Lea. Tourism Development in the Third World, London: Routldge,1988; Peter Burns and Andrew Holden, Tourism: A New Perspective,Prentice Hall, London, 1995.
3[3]A. Bull. The Economics of Travel and Tourism, Melboume, Pitman,1991.