Nurwanti, Nurwanti, Hasmirawati Injar Lasitiha, and Ikosusilowati Ikosusilowati. “The Effectiveness of Using Group Investigation Technique To Enhance Students Speaking Ability at Lakidende University”. Jurnal Pendidikan dan Konseling (JPDK) 4, no. 5 (September 6, 2022): 425–430. Accessed May 20, 2024. http://journal.universitaspahlawan.ac.id/index.php/jpdk/article/view/6624.