Elsa Yulinarda Yahya Nainggolan, Sondang Situmorang, Marlina Sijabat, Masrida A M Situmorang, and Dorlan Naibaho. “ANALISIS SPIKOLOGIS PERKEMBANGAN MASA ANAK-ANAK, REMAJA, DEWASA MADYA, DAN DEWASA AKHIR”. MERDEKA : Jurnal Ilmiah Multidisiplin 1, no. 4 (May 19, 2024): 234–246. Accessed July 30, 2025. https://jurnalistiqomah.org/index.php/merdeka/article/view/1213.