ARMIATI, A.; BUDI, A. S. Identifikasi Efektifitas Pembelajaran Trigonometri Kelas X Masa Pandemi COVID 19 Melalui Whatsapp Group. Jurnal Gantang, [S. l.], v. 6, n. 1, p. 11–17, 2021. DOI: 10.31629/jg.v6i1.2539. Disponível em: https://ojs.umrah.ac.id/index.php/gantang/article/view/2539. Acesso em: 19 dec. 2024.