Kamonkan Witayangkoon. 1990. Secondary social studies teaching competencies as perceived by student-teachers instructors, and administrators in Thailand. , University of North Texas;
Kamonkan Witayangkoon. (1990) Secondary social studies teaching competencies as perceived by student-teachers instructors, and administrators in Thailand . University of North Texas/Denton.
Kamonkan Witayangkoon. Secondary social studies teaching competencies as perceived by student-teachers instructors, and administrators in Thailand. . Denton:University of North Texas, 1990.
Kamonkan Witayangkoon. (1990) Secondary social studies teaching competencies as perceived by student-teachers instructors, and administrators in Thailand . University of North Texas/Denton.