Nasution, Achmad Suryadi, Okto Bryan Simbolon, Triyana Muliawati, Tiara Shofi Edriani, Dear Michiko Mutiara Noor, and Rifky Fauzi. 2025. “Raw Material Inventory Control Using The Period Order Quantity (POQ) Method to Reduce Stockout and Overstock Risks”. Vygotsky: Jurnal Pendidikan Matematika Dan Matematika 7 (2):97-110. https://doi.org/10.30736/voj.v7i2.1163.