Mentari M, Helda, and Hari Murti. “WEB-BASED INFORMATION SYSTEM IN GRAMAS BOOK RENTALS”. Information Technology and Telematics 8, no. 2 (March 20, 2019). Accessed January 18, 2020. https://unisbank.ac.id/ojs/index.php/fti3/article/view/6485.