Hasmoro, Tri, and Benny Ranti. “KAJIAN INVESTASI IMPLEMENTASI PUSH E-MAIL DI PERUSAHAAN EPCC DENGAN METODE REAL OPTION VALUATION: STUDI KASUS PADA PT. REKAYASA INDUSTRI”. Jurnal Sistem Informasi 4, no. 1 (July 12, 2012): 59-66. Accessed April 25, 2024. https://jsi.cs.ui.ac.id/index.php/jsi/article/view/246.