AzizDewi Sukma Nurul, and Diah Krinatuti. “Cognitive Function, Social Interaction, and Self Concept of Elderly Widows and Widowers”. Journal of Family Sciences 2, no. 2 (December 31, 2017): 1-10. Accessed November 22, 2024. https://journal.ipb.ac.id/index.php/jfs/article/view/19155.