Puspita Mardika Sari. Whatsapp based education in pandemic COVID-19 situation: Evaluating video and handbook’s effect on knowledge of village community health-volunteers. BKM-PHCM [Internet]. 2021Nov.3 [cited 2024Nov.28];00. Available from: https://jurnal.ugm.ac.id/v3/BKM/article/view/3291