Laksono, Taufik Dwi, Dwi Sri Wiyanti, and Pingit Broto Atmadi. “PRODUCTIVITY OF CONSTRUCTION PROJECT FROM CONTRACTOR POINT OF VIEW”. International Journal of Engineering Technologies and Management Research 5, no. 12 (December 31, 2018): 123–133. Accessed June 25, 2022. https://www.granthaalayahpublication.org/ijetmr-ojms/ijetmr/article/view/09_IJETMR18_A12_598.