Nazema, Milatun, Muhammad Elmas, and Mutinda Widayanto. “Pengaruh SOP Dan K3 Terhadap Produktivitas Kerja Di PT. Prabu Kencana Surya Pratama Probolinggo”. JUMAD : Journal Management, Accounting, & Digital Business 2, no. 1 (February 28, 2024): 131-140. Accessed May 18, 2024. https://ejournal.upm.ac.id/index.php/jumad/article/view/1550.