sugiarni, rani. (2019). PENERAPAN MEDIA AJAR DIGITAL BERBASIS 4C ( COMMUNICATION, COLLABORATION, CRITICAL THINKING AND PROBLEM SOLVING, DAN CREATIVITY AND INNOVATION) DALAM MENGHADAPI REVOLUSI INDUSTRI 4.0 DI KALANGAN GURU YAYASAN MANDIRI BERSEMI. Qardhul Hasan: Media Pengabdian Kepada Masyarakat, 5(2), 83–89. https://doi.org/10.30997/qh.v5i2.1926