Nachrowi, E., Yani Nurhadryani, and Heru Sukoco. “Evaluation of Governance and Management of Information Technology Services Using Cobit 2019 and ITIL 4 ”. Jurnal RESTI (Rekayasa Sistem Dan Teknologi Informasi), Vol. 4, no. 4, Aug. 2020, pp. 764 -74, doi:10.29207/resti.v4i4.2265.