Oktrivia, Ranti Jihan, and Effy Wardati Maryam. “Social Loafing On Students Of Muhammadiyah University Sidoarjo”. Academia Open 50 (August 19, 2021): 10.21070/acopen.5.2021.2135. Accessed April 25, 2024. https://acopen.umsida.ac.id/index.php/acopen/article/view/2135.