Heykal, Mohamad, and Erlin Erlin. “Analisis Kinerja Perdagangan Kontrak Berjangka Logam Mulia Pada Periode Oktober 2009 - Desember 2009”. Binus Business Review 2, no. 1 (May 30, 2011): 181–191. Accessed December 8, 2025. https://journal.binus.ac.id/index.php/bbr/article/view/1122.