“Sibling Rivalry: Are Gender Differences or Age Ranges of Birth the Cause of Social Jealousy”. GENDER EQUALITY: International Journal of Child and Gender Studies 10, no. 1 (March 31, 2024): 55–65. Accessed March 29, 2026. https://www.jurnal.ar-raniry.ac.id/index.php/equality/article/view/20909.