Amaliyah, Riski, Muhaiminah Akib, and Rezkiah Hartanti. “THE USE OF GROUP INVESTIGATION METHOD TO IMPROVE STUDENTS’ SPEAKING ABILITY AT ENGLISH DEPARTMENT OF SORONG MUHAMMADIYAH UNIVERSITY”. Qalam : Jurnal Ilmu Kependidikan 6, no. 2 (November 15, 2018): 24–31. Accessed April 28, 2024. https://ejournal.um-sorong.ac.id/index.php/jq/article/view/216.