Fitri, Eka.
" 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" <em>JURNAL PENDIDIKAN ROKANIA</em> [Online], Volume 5 Number 3 (13 January 2021)