Waemustafa, Waeibrorheem, and Suriani Sukri. “Systematic and Unsystematic Risk Determinants of Liquidity Risk Between Islamic and Conventional Banks”. International Journal of Economics and Financial Issues, vol. 6, no. 4, Oct. 2016, pp. 1321-7, https://econjournals.com/index.php/ijefi/article/view/2609.