Zulfa Azmi , Isna, and Oktora Yogi Sari. 2020. “AN ANALYSIS OF QUALITY CONTROL IN EFFORTS TO REDUCE THE LEVEL OF PRODUCT DEFECTS AT PT. MAG”. IJER - INDONESIAN JOURNAL OF EDUCATIONAL REVIEW 7 (1):21-27. https://journal.unj.ac.id/unj/index.php/ijer/article/view/16629.