Gyamfi, Timothy Adu, and Richmond Boadaa. “The Effects of Procurement Management Practices on Risk Management in Construction Firms”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 24, no. 3, Oct. 2015, pp. 403-20, https://gssrr.org/JournalOfBasicAndApplied/article/view/4605.