Sonthirak, Thanaphat. 2020. “The Guidelines for Promoting English in OTOP Tourism Community of Nong Nom Wua Sub-District, Lat Yao District, Nakhon Sawan Province”. Humanities and Social Sciences Nakhonsawan Rajabhat University Academic Journal 6 (2). Nakhon Sawan, Thailand:15-27. https://so05.tci-thaijo.org/index.php/hssnsru/article/view/242321.