“PERBEDAAN KESEJAHTERAAN PSIKOLOGIS LANSIA DITINJAU DARI BENTUK DUKUNGAN TEMAN SEBAYA : THE DIFFERENCES IN PSYCHOLOGICAL WELL-BEING OF THE ELDERLY IN TERMS OF SHAPE PEER SUPPORT ABSTRACT”. Psikologia: Jurnal Pemikiran dan Penelitian Psikologi 13, no. 2 (September 3, 2019): 59–73. Accessed August 21, 2025. https://talenta.usu.ac.id/jppp/article/view/2268.