Utami, Santi, and Pipit Utami. “Peningkatan Partisipasi Belajar Dan Hasil Belajar Peserta Didik Teknik Audio Video Di Masa Pandemi Covid-19 Dengan WhatsApp Group”. Elinvo (Electronics, Informatics, and Vocational Education), vol. 5, no. 1, May 2020, pp. 75-88, doi:10.21831/elinvo.v5i1.34254.