Tharika Kaiyatha. (2025) Guidelines for Teacher Competency Development in the 21st Century by Using the Four Principles of Bhavana, Paniad School Group in Phra Nakhon Si Ayutthaya Province. <i>Journal of Philosophical Vision</i>, <i>30</i>(1), 85-105.Tharika Kaiyatha. "Guidelines for Teacher Competency Development in the 21st Century by Using the Four Principles of Bhavana, Paniad School Group in Phra Nakhon Si Ayutthaya Province". Journal of Philosophical Vision 30 (2025):85-105.Tharika Kaiyatha. Guidelines for Teacher Competency Development in the 21st Century by Using the Four Principles of Bhavana, Paniad School Group in Phra Nakhon Si Ayutthaya Province. Mahamakut Buddhist University:ม.ป.ท. 2025.