Widiartin, Tjatursari, and Maslihah Maslihah. “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), vol. 1, no. 1, Oct. 2024, pp. 38-56, doi:10.30742/ijremte.v1i1.6.