Qudratullah, Mohammad Farhan. “Measuring Islamic Stock Performance in Indonesia With A Modified Sharpe Ratio”. Share: Jurnal Ekonomi dan Keuangan Islam 10, no. 2 (December 31, 2021): 155–175. Accessed October 5, 2025. https://jurnal.ar-raniry.ac.id/index.php/Share/article/view/10493.