Lertwitthayawiwat, Natthaphoom, Surasak Yam-um, and Monta Jumpaluang. “A Project Evaluation on Math Diamond of Hua Hin Vitthayalai, Prachuapkhirikhan Province”. Journal of Graduate Saket Review 8, no. 2 (December 31, 2023): 117–129. Accessed May 17, 2024. https://so03.tci-thaijo.org/index.php/saketreview/article/view/267626.