Sulistiana, Eva, Wardatun Nadzifah, and Moh. Samsul Arifin. “Intensive English Program (IEP) Meningkatkan Penguasaan Vocabulary”. Jurnal Studi Guru dan Pembelajaran 2, no. 3 (October 12, 2019): 236–240. Accessed July 22, 2025. https://e-journal.my.id/jsgp/article/view/46.