Widiartin, Tjatursari, and Maslihah Maslihah. 2024. “Designing a Data Storage Structure Using Block Chain in the Twenty-Four Hours of the Prophet’s Sunnah As an Effort to Improve Self-Discipline ”. International Journal of Research in Engineering and Modern Technology (IJREMTE) 1 (1):38-56. https://ijremte.uwks.ac.id/index.php/ijremte/article/view/6.