Prachumchai, S., Yokanya, N. Y., Sriraungrith, P., & Tao-ngoen, S. (2023). A COMPARATIVE STUDY OF A NEW JUNIOR GUIDE CAMP MODEL FOR DEVELOPING 9TH GRADE STUDENTS’ ENGLISH-SPEAKING SKILLS . Journal of MCU Phetchaburi Review, 5(2), pp. 233 – 246. retrieved from https://so03.tci-thaijo.org/index.php/JPR/article/view/265599