Sihombing, Denny Jean Cross. “Development of Employee Performance Management Application for Consumer Service Division in Apartments Using Extreme Programming Methodology”. Jurnal Info Sains : Informatika dan Sains 14, no. 01 (January 7, 2024): 23–33. Accessed August 17, 2026. https://ejournal.seaninstitute.or.id/index.php/InfoSains/article/view/3736.