Kurniawan, R., Resti Andani, L., & Novita Yanda, S. (2023). Is Group Investigation Technique Effective for Teaching Speaking in News Items? An Experimental Design at Senior High School. Jurnal Pendidikan Tambusai, 7(1), 2159–2169. https://doi.org/10.31004/jptam.v7i1.5538