SUTAMA, Sutama. PEMBELAJARAN MATEMATIKA SMP DENGAN PENDEKATAN APTITUDE TREATMENT INTERACTION BERBASIS PORTOFOLIO. MAJALAH ILMIAH PEMBELAJARAN, [S. l.], v. 5, n. 1, 2009. Disponível em: https://journal.uny.ac.id/index.php/mip/article/view/6157. Acesso em: 8 may. 2025.