WIDYANINGSIH, E. Application Of The Group Investigation Model, Using Whatsapp To Increase Learning Outcomes For Class VI Students Of Sd Negeri Trayu Samigaluh Academic Year 2020/2021. IJCER (International Journal of Chemistry Education Research), [S. l.], v. 6, n. 2, p. 102–107, 2022. DOI: 10.20885/ijcer.vol6.iss2.art6. Disponível em: https://journal.uii.ac.id/IJCER/article/view/22682. Acesso em: 8 may. 2024.