Prayughi, Pungki, and Irman Hermadi. “Object-Oriented Analysis And Design Of Research Seminar Online Registration In Higher Education”. Jurnal Pustakawan Indonesia 14, no. 2 (October 28, 2016). Accessed July 3, 2022. https://jurnal.ipb.ac.id/index.php/jpi/article/view/13722.