Aticha Wongwian และ Niti Pawakapan. (2008) Stateless people's needs and problems in obtaining Thai nationality : a case study of hill tribe people in Chiang Rai, Thailand. Chulalongkorn University:ม.ป.ท.Aticha Wongwian และ Niti Pawakapan. 2008. Stateless people's needs and problems in obtaining Thai nationality : a case study of hill tribe people in Chiang Rai, Thailand. ม.ป.ท.:Chulalongkorn University;Aticha Wongwian และ Niti Pawakapan. Stateless people's needs and problems in obtaining Thai nationality : a case study of hill tribe people in Chiang Rai, Thailand. ม.ป.ท.:Chulalongkorn University, 2008. Print.