AMELIA, Sindi; EFFENDI, Leo Adhar. Validity of The Abtract Algebra Teaching Book. Mathematics Research and Education Journal, [S. l.], v. 4, n. 1, p. 17–23, 2020. DOI: 10.25299/mrej.2020.vol4(1).4204. Disponível em: https://journal.uir.ac.id/index.php/JPM/article/view/4204. Acesso em: 21 jul. 2026.