Dwi Istiyarno, Ikhwan Taufik, and Herru Budi Santoso. “Rancang Bangun Mesin Espresso Dengan Sistem Pre-Charge Pneumatic”. Mars : Jurnal Teknik Mesin, Industri, Elektro Dan Ilmu Komputer 2, no. 4 (July 18, 2024): 95–106. Accessed April 28, 2025. https://journal.arteii.or.id/index.php/Mars/article/view/245.