Krisdianata, Yoannes Yuka, Rachelina Larasati, Pichet Saengthien, and Sikarin Kosanwattana. “Integrating Project-Based Learning in English for Ecotourism and Hospitality: A Descriptive Analysis of Student Outcomes”. Saengtham College Journal 17, no. 2 (December 30, 2025): 135–156. accessed September 3, 2026. https://so01.tci-thaijo.org/index.php/scj/article/view/275822.