Cholthissa Ong-arj. (1988) A Phonoloy of Khmu Lue at Nan province. Mahidol University,:ม.ป.ท.Cholthissa Ong-arj. 1988. A Phonoloy of Khmu Lue at Nan province. ม.ป.ท.:Mahidol University,;Cholthissa Ong-arj. A Phonoloy of Khmu Lue at Nan province. ม.ป.ท.:Mahidol University, 1988. Print.