Silaarta, Tifany Jessica, Natalia Patricia Harman, Michalia Virlica Tedjo, Jerzy Valentino Suebu, Patricia Rebeca Isadella Langi, and Abraham Leslie Petir Lelengboto. 2025. “Enhancing Operational Efficiency in Cooperative: A Case Study of Koperasi Usaha Jaya Mandiri”. Indonesian Journal of Advanced Research 4 (5):533-42. https://doi.org/10.55927/ijar.v4i5.14587.