HARON, H. .; RAHMAT, N. H. . Exploring the Theory of Activity in English Language Writing: The Case for WhatsApp. International Journal of Asian Social Science, [S. l.], v. 10, n. 11, p. 671–684, 2020. DOI: 10.18488/journal.1.2020.1011.671.684. Disponível em: https://archive.aessweb.com/index.php/5007/article/view/3224. Acesso em: 1 may. 2024.