Pusit Rujjanavet. (1986) The phonology of Ugong in Uthaithani province. Mahidol University,:ม.ป.ท. 10.14457/MU.the.1986.19
Pusit Rujjanavet. 1986. The phonology of Ugong in Uthaithani province. ม.ป.ท.:Mahidol University,; 10.14457/MU.the.1986.19
Pusit Rujjanavet. The phonology of Ugong in Uthaithani province. ม.ป.ท.:Mahidol University, 1986. Print. 10.14457/MU.the.1986.19