Dini Mutia Havid, Iren Adina Rahmadani Tarigan, Nury Ana Harahap, and Putri Nur Aisyah. 2024. “The Grammartical Error in Speaking English of Student”. Philosophiamundi 2 (4):37-47. https://philosophiamundi.id/index.php/philosophia/article/view/75.