Ningtyas, Safitri Mariyanti, and Lies Amin Lestari. “The Implementation of Differentiated Instruction on English Subject: A Case Study”. RETAIN : Journal of Research in English Language Teaching 12, no. 02 (July 29, 2024): 39–46. Accessed April 4, 2025. https://ejournal.unesa.ac.id/index.php/retain/article/view/62491.