Prayongkul, Ratchaneewan. “The Need in Developing English Language Skills for Communication of the Hospital Receptionists in Phetchabun Province”. Research and Development Journal, Loei Rajabhat University 16, no. 58 (October 12, 2021): 79–87. accessed September 28, 2026. https://so05.tci-thaijo.org/index.php/researchjournal-lru/article/view/247010.