Fortuna, T., S. Mahardika, A. Az’Zahra, and N. (Nino Adhi). “Kesesuaian Hukum Kekekalan Volume Piaget”. PRISMA, Prosiding Seminar Nasional Matematika, Vol. 6, Mar. 2023, pp. 540-5, https://journal.unnes.ac.id/sju/prisma/article/view/66786.