T. . Bumroong-Ayosakoon, P. . Kosito, T. . Somkhaoyai, and V. . Chonrat, “GUIDELINES FOR INTERNAL EDUCATIONAL QUALITY ASSURANCE ACCORDING TO THE 4 IDDHIPADAS PRINCIPLE OF PRIVATE SCHOOLS FOR ORDINARY EDUCATION IN NAKHON SI THAMMARAT PROVINCE”, jg-mcukk, vol. 8, no. 3, pp. 187–199, Sep. 2021.