NINGRUM, E. F. Literature on Student Book and its Effect for Developing Elementary School Teaching Materials. Lingua Cultura, [S. l.], v. 12, n. 2, p. 209-214, 2018. DOI: 10.21512/lc.v12i2.4284. Disponível em: https://journal.binus.ac.id/index.php/Lingua/article/view/4284. Acesso em: 23 feb. 2025.