Wati, W. S., A. A. A. E. . Cahyani, D. . Prihatiningsih, and P. A. . Parwati. “Quality Control Analysis of Creatinine Examination With Westgard Multi Rules and Six Sigma”. Basic and Applied Nursing Research Journal, vol. 6, no. 1, June 2025, pp. 41-49, doi:10.11594/banrj.06.01.05.