Mustofa, Mustofa, and Kristian Selleng. 2013. “DESIGN IMPROVEMENT OF A PNEUMATIC PISTON USING DESIGN FOR ASSEMBLY (DFA) METHOD, A CASE STUDY”. Foristek 3 (1). Palu, Sulawesi Tengah, Indonesia. https://foristek.fatek.untad.ac.id/index.php/foristek/article/view/115.