Indra Mahendra Sukardi, and Agung W. Biantoro. “Analysis of Contract Change Order (CCO) Factors, Cost and Time Factors Affecting Bore Pile Work (Case Study of Cisauk Fly over Construction Project): A Systematic Literature Review”. Engineering And Technology Journal, vol. 10, no. 3, Mar. 2025, pp. 4021-6, doi:10.47191/etj/v10i03.11.