HARNINGSIH S. PENINGKATAN PRESTASI BELAJAR BAHASA INGGRIS MATERI IF CONDITIONAL TYPE 1 MELALUI MODEL PEMBELAJARAN GROUP INVESTIGATION. LANGUAGE [Internet]. 2021 Dec. 20 [cited 2026 May 17];1(2):210-9. Available from: https://jurnalp4i.com/index.php/language/article/view/791