Sriyono, S., Simanjuntak, O. S. ., Agusdin, R. P., & Tahalea, S. P. (2022). A Measuring Satisfaction of Member UPN Veteran Yogyakarta Cooperative Whatsapp Group: Webqual 4.0 Model Adoption. RSF Conference Series: Engineering and Technology, 1(1), 603–609. https://doi.org/10.31098/cset.v1i1.436