Donner, Wolf (1978). The Five Faces of Thailand: An Economic Geography. St. Lucia: University of Queensland Press.
Keyes, Charles F. (1967). Isan: Regionalism in Northeastern Thailand. Cornell University Southeast Asia Program Data Paper no. 65. Ithaca, N.Y.
Mizuno, Koichi (1978). "The Social Organization of Rice-Growing Villages." In Thailand: A Rice-Growing Society, edited by Yoneo Ishii, 83-114. Honolulu: University of Hawaii Press.
Tambiah, S. J. (1970). Buddhism and the Spirit Cults in North-East Thailand. London: Cambridge University Press.