Ramadani, N., S. R. Simanullang, I. N. U. B. Simatupang, P. O. Munthe, and S. S. Harahap. “Role Play & Visual Storytelling As an Innovative Solution to Overcome English Grammar Learning for Sixth-Grade Students of SDN 064037 Medan Tembung on Comparative Adjectives and Prepositions Material ”. DEIKTIS: Jurnal Pendidikan, Bahasa Dan Sastra, Vol. 5, no. 3, July 2025, pp. 1983-8, https://www.dmi-journals.org/deiktis/article/view/1896.