Siew Li, W. S., and M. Y. Arshad. “STUDENTS’ QUESTIONS IN INQUIRY-BASED CHEMISTRY CLASSROOMS”. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW, Vol. 3, no. 1, May 2017, pp. 102 -07, http://103.8.12.212:33180/unj/index.php/ijer/article/view/1205.