Katejan, Angkana. 2013. “A COMPARISON OF LEARNING ACHIEVEMENT AND THE ATTITUDE TOWARDS THE TOPIC ENTITLEDWORD FORMATION THAI LANGUAGE LEARNING OF MATTHAYOMSUKSA 1 STUDENTS USING RIDDLES AND GAMES”. Journal of MCU Social Science Review 2 (1). Ayutthaya, Thailand:1-10. https://so03.tci-thaijo.org/index.php/jssr/article/view/245236.