Mulyadi, Eko. 2020. “ONLINE PHYSICS LEARNING VIA WHATSAPP, GOOGLE FORM, AND EMAIL IN THE ACHIEVEMENT OF ACTIVE PRESENCE AND STUDENT LEARNING OUTCOMES”. Ideguru: Jurnal Karya Ilmiah Guru 5 (1), 34 -. https://doi.org/10.51169/ideguru.v5i1.156.