Fitri, E. (2021). IMPROVING TEACHERS 'COMPETENCY IN IMPLEMENTING BASIC LEARNING BY GIVING TASKS THROUGH THE WHATSSAPP SOCIAL MEDIA APPLICATION AT VOCATIONAL SCHOOL OF ISLAM INNAYAH UJUNG BATU 2020/2021. JURNAL PENDIDIKAN ROKANIA, 5(3), 414 - 424. doi:10.37728/jpr.v5i3.361