อ่อนขาว จรัญ. “The development of learning media for English communication in real-life situations for the Tourist Police in Ayutthaya Historical Park”. RMUTSB ACADEMIC JOURNAL (HUMANITIES AND SOCIAL SCIENCES) 4, no. 2 (December 23, 2019): 232–248. accessed September 28, 2026. https://so05.tci-thaijo.org/index.php/rmutsb-hs/article/view/191667.