SILVI ROMADLONI T. Vocabulary Size Development of English Department Students in State University of Surabaya. RETAIN : J. Res. Engl. Lang. Teach. [Internet]. 2019 Jul. 16 [cited 2025 Jul. 6];7(2). Available from: https://ejournal.unesa.ac.id/index.php/retain/article/view/29195