บุญสอาด อ., กฤชคฤหาสน์ ส., and พงษ์ปิยะรัตน์ อ. “The Development of Assessment of Conceptual Knowledge in Physics by Using a Concept Map : Application of Generalizability Theory”. Journal of Behavioral Science for Development, vol. 6, no. 1, Jan. 2014, https://so02.tci-thaijo.org/index.php/JBSD/article/view/15998.