SASTA PRASETYA J. A DESCRIPTIVE STUDY OF REPEATED DRILL EXERCISE IMPLEMENTATION AS A MEANS TO MEMORIZE THE VERB FORMATION. Retain: J. Res. Engl. Lang. Teach. [Internet]. 2016 Jan. 26 [cited 2026 Jul. 20];1(1). Available from: https://ejournal.unesa.ac.id/index.php/retain/article/view/14059