SIDABALOK, Ruth Novianti; MARPAUNG, Winida; MANURUNG, Yulinda Septiani. Optimisme dan Self Esteem pada Pelajar Sekolah Menengah Atas. Philanthropy: Journal of Psychology, [S. l.], v. 3, n. 1, p. 48–58, 2019. DOI: 10.26623/philanthropy.v3i1.1319. Disponível em: https://journals.usm.ac.id/index.php/philanthropy/article/view/1319. Acesso em: 28 jun. 2026.