Y. A. H. Rambe, Rahma Yunita Ansi, and Endang Dorisday Sitorus, “ENHANCING EFL LEARNERS’ VOCABULARY MASTERY THROUGH FLASH CARDS: A CLASSROOM-BASED STUDY AT SMPN 2 KISARAN”, ELP, vol. 10, no. 2, pp. 142–152, Jun. 2025.