Phāsā khō̜ng nā nā chonphao nai khwāēng Sēkō̜ng Lāo Tai ; khwāmrū phư̄nthān phư̄a kānwičhai læ phatthanā = Languages of the tribes in Xekong province - Thongkham, Theraphan L. (Samnakngan Kongthun Sanapsanun Kanwichai, 2544[2001], 2001)