The Effectiveness of Opinion-Gap Activity to Improve Writing Discussion Text . Jurnal Ilmiah Spectral, [S. l.], v. 3, n. 1, p. 038–053, 2017. Disponível em: https://journal.stbapontianak.ac.id/index.php/spectral/article/view/15. Acesso em: 7 dec. 2025.