Hijriani, A., and A. Dewi. “Priority Determination of Application Candidate Using Ward and Peppard’s Composite Matrix Portfolio and Business Process Analysis for Customer Relationship Management (CRM)”. Systemic: Information System and Informatics Journal, Vol. 4, no. 1, Nov. 2018, pp. 30-38, doi:10.29080/systemic.v4i1.322.