AHSANAH, Finaty. ‘Group Investigation’: A Cooperative Learning Method for the 10th Grade Students in Speaking English Classroom. Tell : Teaching of English Language and Literature Journal, [S. l.], v. 3, n. 1, 2016. DOI: 10.30651/tell.v3i1.311. Disponível em: https://journal.um-surabaya.ac.id/Tell/article/view/311. Acesso em: 7 dec. 2025.