Sriyono, Sriyono, Oliver Samuel Simanjuntak, Riza Prapascatama Agusdin, and Sylvert Prian Tahalea. “A Measuring Satisfaction of Member UPN Veteran Yogyakarta Cooperative Whatsapp Group: Webqual 4.0 Model Adoption”. RSF Conference Series: Engineering and Technology 1, no. 1 (November 15, 2022): 603–609. Accessed September 1, 2024. https://proceeding.researchsynergypress.com/index.php/cset/article/view/436.