วัฒนวงศ์ วรวรรณ. 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). Bangkok, Thailand:163-74. https://so04.tci-thaijo.org/index.php/swurd/article/view/28429.