DJVU PDF Henderson, E.J.A. 1975, "Phonetic description and phonological function: some reflections upon back unrounded vowels in Thai, Khmer, and Vietnamese", in Studies in Tai Linguistics in Honor of William J. Gedney, ed. J.G. Harris and J.R. Chamberlain, pp. 259-270. Central Institute of English Language. cite.

DJVU PDF Noss, R.B. 1975, "How useful are citation forms in synchronic Thai phonology?", in Studies in Tai Linguistics in Honor of William J. Gedney, ed. J.G. Harris and J.R. Chamberlain, pp. 274-284. Central Institute of English Language. cite.