Mas Pertiwi, I Gusti Agung Istri, I Wayan Suasira, Wayan Sri Kristinayanti, Evin Yudhi Setyono, & Ketut Wiwin Andayani. "Cash flow optimal analysis on NPV risk based on break event point of various types of housing in housing development projects." Proceedings [Online], 1.1 (2017): 184-193. Web. 18 Nov. 2019