Maharani, S., T. Khasanah, and N. (Nino Adhi). “Hukum Kekekalan Volume Berdasarkan Teori Perkembangan Mental Piaget”. PRISMA, Prosiding Seminar Nasional Matematika, Vol. 6, Mar. 2023, pp. 546-50, https://journal.unnes.ac.id/sju/prisma/article/view/66787.