MINARTI, I. B. .; MULYANINGRUM, E. R. .; UTAMI, A. R. S. . Analysis of the variety of learning difficulties of grade IX students in the online learning system on the material of the human reproductive system at SMP PGRI 9 Pemalang. Cendikia : Media Jurnal Ilmiah Pendidikan, [S. l.], v. 13, n. 5, p. 703-708, 2023. DOI: 10.35335/cendikia.v13i5.3783. Disponível em: https://iocscience.org/ejournal/index.php/Cendikia/article/view/3783. Acesso em: 29 aug. 2026.