Nurhaliza, Nurhaliza, and Nurullah Husufa. “Development of Website-Based Thousand Island Tour Package Booking Application Using Waterfall Method”. Journal of Information Systems and Informatics 4, no. 3 (September 1, 2022): 524–537. Accessed March 7, 2026. https://journal-isi.org/index.php/isi/article/view/279.