Nurwanti, N., Lasitiha, H. I. ., & Ikosusilowati, I. (2022). The Effectiveness of Using Group Investigation Technique To Enhance Students Speaking Ability at Lakidende University. Jurnal Pendidikan Dan Konseling (JPDK), 4(5), 425–430. https://doi.org/10.31004/jpdk.v4i5.6624