Khounbolay, T. (2019). The Effect of Providing Students with On-Board-Content Note on Their Learning Mathematics: A Study of First Year Pre-Service Science Teachers in the Faculty of Education, National University of Laos. สิกขา วารสารศึกษาศาสตร์, 6(1), 24–31. สืบค้น จาก https://so05.tci-thaijo.org/index.php/sikkha/article/view/157781