Thanagorn Engamornrattana และ Damrong Thaveesaengsakulthai. (1997) Self-assessment of quality management systems for a Thai telecommunication company. Chulalongkorn University:ม.ป.ท.Thanagorn Engamornrattana และ Damrong Thaveesaengsakulthai. 1997. Self-assessment of quality management systems for a Thai telecommunication company. ม.ป.ท.:Chulalongkorn University;Thanagorn Engamornrattana และ Damrong Thaveesaengsakulthai. Self-assessment of quality management systems for a Thai telecommunication company. ม.ป.ท.:Chulalongkorn University, 1997. Print.