8Cukier, J G Wall. Tourism Enpolyment : Perspectives from Bali [ J ]. Tourism Management, 1993, 14:195 - 201.
9Wall G. People Outside the Plans. Proceedings: Indonesia-Swiss Forum on Culture and International Tourism [ M ]. Yogyakarta: Gadjah Mada University, 1996 : 56 - 61.
10Wahnschafft R. Formal and informal tourism sectors: A case of Pattaya, Thailand[J]. Annals of Tourism Research, 1982, (9) :429 - 451.