Ashari, W., and T. L. Wati. “The Effect of Smart Card Media Utilization on Learning Outcomes of Mathematics Subjects for Grade 1 Elementary School: Pengaruh Pemanfaatan Media Smart Card Terhadap Hasil Belajar Mata Pelajaran Matematika Kelas 1 SD”. Academia Open, vol. 6, June 2022, p. 10.21070/acopen.6.2022.2278, doi:10.21070/acopen.6.2022.2278.