UMAR, Livia; SAVITRI, Setiawati Intan. Sibling Rivalry and Psychological Well-Being in Early Adulthood. Biopsikososial: Jurnal Ilmiah Psikologi Fakultas Psikologi Universitas Mercubuana Jakarta, Jakarta, Indonesia, v. 10, n. 1, p. 24–38, 2026. DOI: 10.22441/biopsikososial.v10i1.37367. Disponível em: https://training-ojs3-publikasi.mercubuana.ac.id/index.php/biopsikososial/article/view/37367. Acesso em: 29 may. 2026.