Hadi, Titih Rejyasmito, and Eko Marpanaji. “Designing and Quality Testing of ‘Digichip’ Virtual Simulation Software of Android Platform for Mobile-Virtual Learning Supporting Vocational Mechatronics Engineering”. Jurnal Pendidikan Vokasi 9, no. 2 (June 30, 2019): 105–118. Accessed June 3, 2025. https://journal.uny.ac.id/index.php/jpv/article/view/23570.