Azzahra, A., S. Suhardi, and M. Amin. “The Effect of Tax Expenses, Profit Volatility, and Cash Holding on the Quality of Profits of Companies in the Basic Industry and Chemical Sectors”. Economic: Journal Economic and Business, vol. 4, no. 2, Apr. 2025, pp. 160-9, doi:10.56495/ejeb.v4i2.1003.