A. Phamornsoot, T. Petsong, and S. Sertpunya, “DEVELOPING GUIDELINES FOR IMPROVING THE ENGLISH STUDY COURSES FOR MATHAYOM 1 SECONDARY STUDENTS AT RAJAVINIT MATHAYOM SCHOOL, BANGKOK ”, PNRU JHSS, vol. 19, no. 2, pp. 112–128, Dec. 2024.