Vannapha, P., S. Phayyavong, K. Thiphaphone, and B. Phanthong. “The Impact of Teaching Aids on Learning and Development of Preschool Children in Luangprabang District”. Souphanouvong University Journal Multidisciplinary Research and Development, vol. 11, no. Special Issue, Jan. 2026, pp. 146-53, doi:10.69692/SUJMRD11Special146.