เถาเครือมาส จ., A. Lenanan, and A. Panit. “The Development of English Teachers for Improving Speaking Skills of the Students by Using Professional Learning Community in Anuban Prachuap Khirikhan School”. Journal of MCU Phetchaburi Review, vol. 9, no. 2, Aug. 2026, pp. 210-2, https://so03.tci-thaijo.org/index.php/JPR/article/view/302963.