IMPROVING STUDENT’S VOCABULARY MASTERY THROUGH GROUP CHAT DISCUSSION ON WHATSAPP AT THE TENTH GRADE STUDENTS OF SMA NEGERI 16 BANDAR LAMPUNG IN THE ACADEMIC YEAR 2022/2023. jees. 2022;4(2):1-8. Accessed February 1, 2026. https://eskripsi.stkippgribl.ac.id/index.php/jees/article/view/392