Coba jelasin Pustaka lanjutan dari Rumpun bahasa Kra-Dai dong

Chamberlain, James R. (2016). Kra-Dai and the Proto-History of South China and Vietnam. Journal of the Siam Society, 104, 27-76.

Diller, A., J. Edmondson, & Yongxian Luo, ed., (2005). The Tai–Kadai languages. London [etc.]: Routledge.

Edmondson, J. A. (1986). Kam tone splits and the variation of breathiness.

Edmondson, J. A., & Solnit, D. B. (eds.) (1988). Comparative Kadai: linguistic studies beyond Tai. Summer Institute of Linguistics publications in linguistics, no. 86. Arlington, TX: Summer Institute of Linguistics.

Mann, Noel, Wendy Smith and Eva Ujlakyova. 2009. Linguistic clusters of Mainland Southeast Asia: an overview of the language families.  Chiang Mai: Payap University.

Ostapirat, Weera. (2000). "Proto-Kra." Linguistics of the Tibeto-Burman Area 23 (1): 1-251.

Somsonge Burusphat, & Sinnott, M. (1998). Kam–Tai oral literatures: collaborative research project between. Salaya Nakhon Pathom, Thailand: Institute of Language and Culture for Rural Development, Mahidol University.