Mahnun, Siti. “Problem Based Learning for Learning Indonesian Language in Sma Muhammadiyah Ternate”. Gramatika: Jurnal Kebahasaan dan Kesastraan 4, no. 1 (June 1, 2016): 65-70. Accessed September 23, 2026. http://118.98.227.77/index.php/gramatika/article/view/50.