DWI PRISDIYANTI A. The Implementation of Group Investigation Technique in Teaching Writing Hortatory Exposition Text for Eleventh Grade Students of Senior High School. RETAIN : J. Res. Engl. Lang. Teach. [Internet]. 2019 Sep. 24 [cited 2025 Jul. 5];7(3). Available from: https://ejournal.unesa.ac.id/index.php/retain/article/view/30606