AL HAFIZ, N. W.; NOPRIANDI, H. Designing Number Learning Applications and Early Childhood Mathematics Calculations. Sinkron : jurnal dan penelitian teknik informatika, [S. l.], v. 3, n. 2, p. 212-217, 2019. DOI: 10.33395/sinkron.v3i2.10083. Disponível em: https://www.jurnal.polgan.ac.id/index.php/sinkron/article/view/10083. Acesso em: 18 apr. 2026.