.Ritzkal, R., A. . . Abdul Aziz, F. S. . . Fajar Kusumah, F. S. F. . . Kusumah, and K. Kodarsyah. “ Web and Arduino Automatic Selling Machine Monitoring Prototype”. Jurnal Mantik, vol. 5, no. 4, Feb. 2022, pp. 2667-74, https://iocscience.org/ejournal/index.php/mantik/article/view/2053.