Salsabila, Helmi, Antonius Alijoyo, and Muhammad A. “Microcontroller-Based Automatic Liquid Soap Refill System Process With Circular Economy Integration”. Building of Informatics, Technology and Science (BITS) 6, no. 2 (September 9, 2024): 901-910. Accessed October 9, 2026. https://ejurnal.seminar-id.com/index.php/bits/article/view/5677.