Sonthirak, T. (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. Nakhon Sawan, Thailand, 6(2), pp. 15–27. available at: https://so05.tci-thaijo.org/index.php/hssnsru/article/view/242321 (accessed: 29 September 2026).