วิทฤทธิ์ โคตรมณี. (2021) Development Instructional Model in Waveguide and Propagationusing PIAEDA Learning Model. <i>Journal of Humanities and Social Sciences University of Phayao</i>, <i>9</i>(1), 15-28.วิทฤทธิ์ โคตรมณี. "Development Instructional Model in Waveguide and Propagationusing PIAEDA Learning Model". Journal of Humanities and Social Sciences University of Phayao 9 (2021):15-28.วิทฤทธิ์ โคตรมณี. Development Instructional Model in Waveguide and Propagationusing PIAEDA Learning Model. University of Phayao:ม.ป.ท. 2021.