Shabrina, F., R. Maisyarah, and M. I. Nasution. “The Effect of Risk-Based Internal Audit on the Effectiveness of Perumda Tirtanadi’s Financial Performance With ISO 9001 Implementation”. Indonesian Journal of Multidisciplinary Sciences (IJoMS), vol. 5, no. 2, Sept. 2026, pp. 2047-58, doi:10.59066/ijoms.v5i2.2706.