Target, N., S. Hajisalah, A. Janjaroon, and K. Panichakarn. “A STUDY OF MATHAYOMSUKSA I STUDENTS ANALYTICAL THINKING ABILITIES ON RATIO AND PERCENTAGES THROUGH INQUIRY-BASED LEARNING ACTIVITIES”. Journal of Industrial Education, Vol. 18, no. 2, Aug. 2019, pp. 84-92, https://ph01.tci-thaijo.org/index.php/JIE/article/view/179457.