Analisis Faktor Penyebab Perubahan Kontrak Pada Pekerjaan Pembangunan RS UPT Vertikal Surabaya : Analysis Factors Causing Contract Changes In The Construction Of UPT Vertical Hospital Surabaya RS UPT Vertikal Surabaya. (2025). CONCRETE: Construction and Civil Integration Technology, 3(01), 10–17. https://doi.org/10.25139/concrete.v3i01.9958