Angraeni, C., Loska, F., Maghfiroh, L. and (Nino Adhi), N. (2023) “Penelitian Teori Perkembangan Piaget Tahap Operasional Konkret Hukum Kekekalan Volume Anak Usia 11─12 Tahun”, PRISMA, Prosiding Seminar Nasional Matematika, 6, pp. 177-180. Available at: https://journal.unnes.ac.id/sju/prisma/article/view/66595 (Accessed: 18May2024).