Voutama, Apriade, and Elfina Novalia. 2022. “Web-Based Graduation Plaque Information System Design Using UML and Waterfall Model: Web-Based Graduation Plaque Information System Design Using UML and Waterfall Model”. Syntax : Jurnal Informatika 11 (01):36-49. https://doi.org/10.35706/syji.v11i01.6412.