อ่อนขาว จ. “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), vol. 4, no. 2, Dec. 2019, pp. 232-48, https://so05.tci-thaijo.org/index.php/rmutsb-hs/article/view/191667.