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 . JPPP [Internet]. 2019 Sep. 3 [cited 2026 May 1];13(2):59-73. Available from: https://talenta.usu.ac.id/jppp/article/view/2268