Gamariel, M. ., and R. . Egide. “Effects of Contract Negotiation, Contract Monitoring and Relationship Management on Construction Projects Performance. A Case of Water Treatment Plants for Wasac”. Social Science Learning Education Journal, vol. 6, no. 12, Dec. 2021, pp. 771-80, https://sslej.in/index.php/sslej/article/view/3487.