Ali Imron, M. et al. 2022. Analysis of Factors Causing Variation Order In Construction Projects of PT. Tatamulia Nusantara Indah Surabaya Branch Office 2018-2022 Period. Devotion : Journal of Research and Community Service. 3, 14 (Dec. 2022), 2695–2706. DOI:https://doi.org/10.36418/dev.v3i14.328.