Yhlas Hayytjanov, Nutreutai Arunsirot. “The Effects of Flipped Classroom on English Grammar Proficiency of Thai EFL Students in Chiang Mai Province”. European Economic Letters (EEL) 14, no. 2 (April 17, 2024): 281–288. Accessed December 7, 2025. https://www.eelet.org.uk/index.php/journal/article/view/1320.