DJVU PDF Norquest, P. 2004, "Review of Moyu Yanjiu [A study of Mak] by YANG Tongyin", in Linguistics of the Tibeto-Burman Area, vol. 27, no. 1, pp. 143-156. cite.
DJVU PDF Oshike, B.T. 1979, "The Kam-Sui-Mak and Northern Tai Languages", in Papers in Southeast Asian Linguistics No.6, Tai Studies in Honor of William J. Gedney, ed. T.W. Gething and N.D. Liem, vol. 6, pp. 125-142. Pacific Linguistics, the Australian National University. cite.