DJVU PDF Yang Quan. 1998, "A brief study on the succinctness of the Kam culture: the great song of the Kam people", in The International Conference on Tai Studies, ed. S. Burusphat, Bangkok, Thailand, pp. 429-434. Institute of Language and Culture for Rural Development, Mahidol University. cite.

DJVU PDF Yang, Q. and Edmondson, J.A. 1997, "The Kam in Ancient Times", in Southeast Asian Linguistics Studies In Honor of Vichin Panupong, ed. A.S. Abramson, pp. 325-336. Chulalongkorn University Press. cite.