Mulyadi E. ONLINE PHYSICS LEARNING VIA WHATSAPP, GOOGLE FORM, AND EMAIL IN THE ACHIEVEMENT OF ACTIVE PRESENCE AND STUDENT LEARNING OUTCOMES. ideguru [Internet]. 2020Jun.21 [cited 2024Apr.26];5(1):34 -. Available from: https://jurnal-dikpora.jogjaprov.go.id/index.php/jurnalideguru/article/view/156