prastiya, andika. “EFEKTIVITAS IMPLEMENTASI PROGRAM 5S (SEIRI, SEITON, SEISO, SEIKETSU, SHITSUKE) DI PT PJB UP GRESIK”. Jurnal Manajerial 1, no. 1 (August 15, 2018): 72–79. Accessed June 6, 2025. https://journal.umg.ac.id/index.php/manajerial/article/view/421.