Keawta Saliphot. 1998. A phonological study of Vietnamese at Chumchon Watsritheppradittharam, Muang district, Nakhonphanom province. Faculty of Graduate Studies, Mahidol University;
Keawta Saliphot. (1998) A phonological study of Vietnamese at Chumchon Watsritheppradittharam, Muang district, Nakhonphanom province . Mahidol University/Bangkok.
Keawta Saliphot. A phonological study of Vietnamese at Chumchon Watsritheppradittharam, Muang district, Nakhonphanom province. . Bangkok:Mahidol University, 1998.
Keawta Saliphot. (1998) A phonological study of Vietnamese at Chumchon Watsritheppradittharam, Muang district, Nakhonphanom province . Mahidol University/Bangkok.