วัฒนวงศ์ ว. 2015. A STUDY ON A CALCULATION SKILL – ADDITION – AND HAPPINESS OF PRATHOMSUKSA FOUR STUDENTS WITH DIFFERENT INTELLIGENCE QUOTIENT USING MATHEMATICS GAMES AND EXERCISES. Srinakharinwirot Research and Development Journal of Humanities and Social Sciences. 6, 11, January-June (Jan. 2015), 163–174.