Kewal, Suramaya Suci. “PEMBENTUKAN PORTOFOLIO OPTIMAL SAHAM-SAHAM PADA PERIODE BULLISH DI BURSA EFEK INDONESIA”. Jurnal Economia 9, no. 1 (April 27, 2013): 81–91. Accessed May 12, 2025. https://journal.uny.ac.id/index.php/economia/article/view/1378.