Analisis Quality Control Internal Pemeriksaan Sgot Dan Sgpt Menggunakan Grafik Levey-Jennings dan Six Sigma Di RS X Yogyakarta: Internal Quality Control Analysis of Sgot and Sgpt Examination Using Levey-Jennings Graphics and Six Sigma at X Hospital Yogyakarta. JoH 2025, 12 (1), 060-068. https://doi.org/10.30590/joh.v12n1.1002.