Firli, Gresselda Sharen. “Sharia Business Ethics Online Forex Trading at Company Signal Providers Volatility 75 Index JR (VIXJR)”. International Journal of Social Science, Education, Communication and Economics (SINOMICS JOURNAL) 1, no. 6 (January 31, 2023): 809–818. Accessed January 13, 2025. https://sinomicsjournal.com/index.php/SJ/article/view/92.