DJVU PDF Diller, A. 1985, "Tones and vowels in Southern Thai: a diachronic anomaly", in Southeast Asian Linguistic Studies Presented to André-G. Haudricourt, ed. S. Ratanakul et al., pp. 310-354. Institute of Language and Culture for Rural Development, Mahidol University. cite.

DJVU PDF Diller, A. 1982, "A New High Tone in Southern Thai", in Papers in Southeast Asian Linguistics No.8, Tonation, ed. D. Bradley, vol. 8, pp. 133-154. Pacific Linguistics, the Australian National University. cite.

DJVU PDF Diller, A. 1979, "How Many Tones for Southern Thai?", in South-east Asian Linguistic Studies Vol. 4, ed. N.D. Liem, vol. 4, pp. 117-129. Pacific Linguistics, the Australian National University. cite.

DJVU PDF Karavi, P. 1996, "Khmer loanwords: the linguistics alien fossilized in the southern Thai dialect", in The Fourth International Symposium on Language and Linguistics, Thailand, pp. 1037-1050. Institute of Language and Culture for Rural Development, Mahidol University. cite.

DJVU PDF Rose, P. 1997, "Seven-Tone Dialect in Southern Thai with Super-High, a: Pakphanang Tonal Acoustics and Physiological Inferences", in Southeast Asian Linguistics Studies In Honor of Vichin Panupong, ed. A.S. Abramson, pp. 191-208. Chulalongkorn University Press. cite.