Vuong Quoc Anh และ Manisri Puntularp. (2006) The determinants affecting the enrollment of voluntary health insurance scheme in Red River Dekta region in Vietnam. Chulalongkorn University:ม.ป.ท.Vuong Quoc Anh และ Manisri Puntularp. 2006. The determinants affecting the enrollment of voluntary health insurance scheme in Red River Dekta region in Vietnam. ม.ป.ท.:Chulalongkorn University;Vuong Quoc Anh และ Manisri Puntularp. The determinants affecting the enrollment of voluntary health insurance scheme in Red River Dekta region in Vietnam. ม.ป.ท.:Chulalongkorn University, 2006. Print.