Simbolon, M. E., E. Hermawati, and S. L. Baharizqi. “The Effect of Using Ludo Boardsgames Learning Media on Students’ Concept Understanding Ability”. International Conference on Elementary Education, Vol. 4, no. 1, Apr. 2022, pp. 418-30, https://proceedings.upi.edu/index.php/icee/article/view/2014.