Tiarnita Maria Sarjani Br.Siregar, Siti Afiqa Rahmah Manik, Habibah Rusly Elly, Anthony Chornelius Nadeak, Nazwi Haliza Purba, and Natasya Ruth Putri Panjaitan, “The Effectiveness of Role Play in Improving EFL Students’ Speaking Ability: A Systematic Literature Review”, IJEL, vol. 5, no. 1, pp. 122–125, Apr. 2026.