DJVU PDF Bradley, D. 1992, "Tone alternations in Ugong (Thailand)", in Papers on Tai languages, Linguistics, and Literatures, ed. C.J. Compton and J.F. Hartmann, pp. 55-64. Center for Southeast Asian Studies, Northern Illinois University. cite.

DJVU PDF Cooke, J.R. 1992, "The problem of the sixth tone in Thai", in Papers on Tai languages, Linguistics, and Literatures, ed. C.J. Compton and J.F. Hartmann, pp. 65-76. Center for Southeast Asian Studies, Northern Illinois University. cite.

DJVU PDF Edmondson, J.A. 1992, "A study of the tones and initials in Kam, Lakkja, and Hlai", in Papers on Tai languages, Linguistics, and Literatures, ed. C.J. Compton and J.F. Hartmann, pp. 77-102. Center for Southeast Asian Studies, Northern Illinois University. cite.

DJVU PDF Hartmann, J.F. 1992, "Tai Dam poetics and Proto-Tai tone categories", in Papers on Tai languages, Linguistics, and Literatures, ed. C.J. Compton and J.F. Hartmann, pp. 262-277. Center for Southeast Asian Studies, Northern Illinois University. cite.