SHINWARI, Mirwace Khan; SHINWARI, Ismail; SHINWARI, Fateh Gul. Investigating the Impacts of Grammatical Mistakes of English ‎Writing and Speaking Skills in English Department Students at ‎Sayed Jamaluddin Afghani University. Nangarhar University Social Science Journal, [S. l.], v. 2, n. 04, p. 09–14, 2025. DOI: 10.70436/nussj.v2i04.63. Disponível em: http://nussj.nu.edu.af/index.php/nussj/article/view/63. Acesso em: 7 dec. 2025.