Aguilar Concepcion, E., and Y. Ye. “A Comparative Study of Grades 7, 8 and 9 Students’ Motivation for Learning English As A Foreign Language in The Regular Program and English Program at Tepleela School, Bangkok, Thailand”. Scholar: Human Sciences, vol. 9, no. 2, Jan. 2018, p. 251, http://www.assumptionjournal.au.edu/index.php/Scholar/article/view/3001.