Hamzy, Aryati, and Cheng-Chung Chen. “Age Differences and Self-Concept Predict Indonesian Females’ Mental Health”. Journal of Health Economic and Policy Research (JHEPR) 2, no. 2 (August 29, 2024): 40–45. Accessed July 5, 2026. http://ejournal.ump.ac.id/index.php/jhepr/article/view/142.