WAHYUNI, Reni; HERMAN, Tatang; FATIMAH, Siti. Letters in Algebra as The Transition from Arithmetic Thinking to Algebraic Thinking. Mosharafa: Jurnal Pendidikan Matematika, [S. l.], v. 12, n. 3, p. 441–452, 2023. DOI: 10.31980/mosharafa.v12i3.818. Disponível em: https://journal.institutpendidikan.ac.id/index.php/mosharafa/article/view/818. Acesso em: 5 jul. 2024.