SHALEHAH, H. N.; BAEHAQI, L.; MIFTAH, M. Z. Spaced repetition for vocabulary retention in EFL and ESL learning: A systematic literature review. Journal of Research on English and Language Learning (J-REaLL), [S. l.], v. 7, n. 2, p. 428–451, 2026. DOI: 10.33474/j-reall.v7i2.25562. Disponível em: https://riset.unisma.ac.id/index.php/JREALL/article/view/25562. Acesso em: 4 sep. 2026.