Salsabella, A. ., & Aryani, T. . (2022). Sigma Matrix of Ureum and Creatinine in Some Laboratories: Overview: Gambaran Matrik Sigma Pemeriksaan Ureum dan Kreatinin pada Beberapa Laboratorium. Medicra (Journal of Medical Laboratory Science Technology), 5(1), 40–46. https://doi.org/10.21070/medicra.v5i1.1628