2021. Cost of Quality Environmental and the Role to Improve the Environmental Performance. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ). 41, 3 (Oct. 2021), 135–156. DOI:https://doi.org/10.55562/jrucs.v41i3.178.