ROSIANA, C. Developing Supplementary Writing Material For University Students. Dharma Pendidikan, [S. l.], v. 12, n. 2, p. 48 - 61, 2021. Disponível em: https://journal.stkipnganjuk.ac.id/index.php/jdp/article/view/124. Acesso em: 2 mei. 2024.