Abdel Rashid, Ibrahim, Mohamed El-Mikawi, and Hossam El-Din Mohamed Baha. 2019. “Factors Affecting the Calculations of Return on Investment (ROI) in Public-Private Partnerships (PPP) Projects In Egypt”. ARCHive-SR 2 (4):332-45. https://doi.org/10.21625/archive.v2i4.381.