“Factors Causing Overbudget for Roof Cover Work in the Construction of High-Rise Buildings”. International Journal of Engineering Research and Advanced Technology (ijerat) (E-ISSN 2454-6135) DOI: 10.31695 IJERAT, vol. 5, no. 5, May 2019, pp. 10-18, https://doi.org/10.31695/IJERAT.2019.3434.