Sanusi, A. A., L. . . Sutandi, and Z. A. . . Djamaluddin. “Designing an Electronic Ticketing System (E-Ticketing) for Crossing Transportation in Indonesia Using an Object-Oriented Analysis and Design (OOAD) Approach”. Jurnal Mantik, vol. 6, no. 4, Feb. 2023, pp. 3737-45, https://iocscience.org/ejournal/index.php/mantik/article/view/3420.