Matondang , Khairani Alawiyah, Agnes Monica Sianipar, Enjel Widia Sari Gea, and Respa Mellia Sirait. “Pengaruh Modal Sendiri Dan Volume Usaha Terhadap Sisa Hasil Usaha Koperasi Di Provinsi Pulau Sumatera Periode 2019-2023”. RIGGS: Journal of Artificial Intelligence and Digital Business 5, no. 2 (May 25, 2026): 4732–4741. Accessed July 31, 2026. https://journal.ilmudata.co.id/index.php/RIGGS/article/view/9236.