Prachumchai, Sapolachet, Nikom Yokanya Yokanya, Preecha Sriraungrith, and Samran Tao-ngoen. “A COMPARATIVE STUDY OF A NEW JUNIOR GUIDE CAMP MODEL FOR DEVELOPING 9TH GRADE STUDENTS’ ENGLISH-SPEAKING SKILLS”. Journal of MCU Phetchaburi Review 5, no. 2 (May 23, 2023): pp. 233 – 246. accessed August 29, 2026. https://so03.tci-thaijo.org/index.php/JPR/article/view/265599.