S. Sirichokchaitrakool, P. Boonpo, and M. Srichinda, “The study of problem-solving abilities by digital games-based learning (DGBL) together with visual thinking; social studies for grade 1 students”, SWRD. J. Humanit. Soc. Sci., vol. 17, no. 1, January-June, pp. 1–15, Article 267714, Jun. 2025.