“Analisis Investasi Rumah Tinggal 2 Lantai Proyek Berdasarkan Metode NPV, IRR, BCR dan Cash Flow” (2026) Journal of Science and Engineering, 2(1), pp. 30–36. Available at: https://journal.ajbnews.com/index.php/prothon/article/view/307 (Accessed: 13 May 2026).