Gyamfi, T. A., Boadaa, R., & Adu-Fosu, B. (2016). Risk Analysis of Procurement Options: Implications for Construction Firms in Ghana. International Journal of Sciences: Basic and Applied Research (IJSBAR), 28(1), 90-102. https://www.gssrr.org/JournalOfBasicAndApplied/article/view/5163