Phamornsoot, A., Petsong, T. and Sertpunya, S. (2024) “DEVELOPING GUIDELINES FOR IMPROVING THE ENGLISH STUDY COURSES FOR MATHAYOM 1 SECONDARY STUDENTS AT RAJAVINIT MATHAYOM SCHOOL, BANGKOK ”, Phranakhon Rajabhat Research Journal : Humanities and Social Sciences, 19(2), pp. 112–128. available at: https://so05.tci-thaijo.org/index.php/PNRU_JHSS/article/view/273572 (accessed: 29 September 2026).