Purnama, Putra Zakaria, Nelly Budiharti, and Thomas Priyasmanu. “RANCANG BANGUN MESIN OVEN KOPI DENGAN PRINSIP QFD DAN ERGONOMI ”. Jurnal Valtech 3, no. 2 (September 16, 2020): 25-31. Accessed July 14, 2026. https://ejournal.itn.ac.id/valtech/article/view/2763.