Andika Sari, D., E. . Nuryuliani, N. . Prapti, and R. . Pasco Bayan. “Relationship Between Preparation and Attitude in 3-4 Year Old Children Regarding Newborn Sibling”. Al-Athfal: Jurnal Pendidikan Anak, vol. 8, no. 1, June 2022, pp. 1-12, doi:10.14421/al-athfal.2022.81-01.