“The Impact of Customer Contact Type According to CCM Model on the Operational Efficiency of the System Providing the Service”. 2021. Journal of Al-Rafidain University College For Sciences ( Print ISSN: 1681-6870 ,Online ISSN: 2790-2293 ) 39 (1): 150-77. https://doi.org/10.55562/jrucs.v39i1.210.