Kontribusi Dukungan Orang Tua dan Teman terhadap Kepercayaan Diri Atlet Usia Sekolah Menengah Pertama di Cahaya Lestari Surabaya. Jurnal Ilmiah Mandala Education, [S. l.], v. 8, n. 1, 2022. DOI: 10.58258/jime.v8i1.2703. Disponível em: https://ejournal.mandalanursa.org/index.php/JIME/article/view/2703. Acesso em: 29 jun. 2026.