Pane, H. and Gaustama Putra 2023. Barcode-Based Light Fire Extinguisher (APAR) Monitoring with the Waterfall Case Study Method of PT. PLN (Persero) UPK Nagan Raya. Jurnal Inotera. 8, 1 (Feb. 2023), 82-91. DOI:https://doi.org/10.31572/inotera.Vol8.Iss1.2023.ID218.