Rahayu, Dinar, and Encep Riswan Suherlan. 2025. “Development of Website-Based Outsourcing Services Negotiation System Using Extreme Programming Method at PT. XYZ”. SISINFO : Jurnal Sistem Informasi Dan Informatika 7 (2):213-28. https://doi.org/10.37278/sisinfo.v7i2.1336.