DJVU PDF Tingsabadh, M.R.K. and Krisnaphan, D. 1992, "Tonal overlapping: an instrumental study of Suphanburi Thai", in The Third International Symposium on Language and Linguistics, Bangkok, Thailand, pp. 804-817. Chulalongkorn University. cite.

DJVU PDF Tingsabadh, M.R.K. 1988, "Loss of preeminence of citation forms in the study of tones on Thai dialects", in The International Symposium on Language and Linguistics, ed. C. Bamroongraks et al., Bangkok, Thailand, pp. 224-227. Thammasat University. cite.