Items where Author is "Ningrum, Umi Prastya"
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Mardianto, Mardianto and Nasution, Inom and Ningrum, Umi Prastya (2020) Application of Total Quality Services (TQS) in Course Institutions and Training Main Jaya Deli Serdang District. International Journal of Latest Research in Humanities and Social Science (IJLRHSS), 03 (06). pp. 1-5.