Khanyot, T., Sriraungrith, P. and Prachumchai, S. (2024) “THE RESULTS OF UTILIZING A CEFR-BASED ENGLISH LANGUAGE TRAINING PACKAGE TO IMPROVE ENGLISH PROFICIENCY LEVELS FOR 6 TH-GRADE STUDENTS ”, Journal of MCU Phetchaburi Review , 7(1), pp. หน้า 224 – 236. available at: https://so03.tci-thaijo.org/index.php/JPR/article/view/273803 (accessed: 12 September 2026).