Sianipar, Osman. “ROLE OF DELTA CHECK IN CLINICAL LABORATORY SERVICES”. INDONESIAN JOURNAL OF CLINICAL PATHOLOGY AND MEDICAL LABORATORY 25, no. 1 (April 10, 2019): 111–114. Accessed April 28, 2024. https://indonesianjournalofclinicalpathology.org/index.php/patologi/article/view/1517.