The Relationship between Self-Concept and Academic Procrastination in Al-Washliyah 3 High School Students in Medan. Jurnal Ilmiah Mandala Education, [S. l.], v. 11, n. 1, p. 74–83, 2025. DOI: 10.58258/jime.v11i1.8139. Disponível em: https://ejournal.mandalanursa.org/index.php/JIME/article/view/8139. Acesso em: 17 sep. 2026.