Tri Handayani, Devi, et al. “Pengaruh Kualitas Pelayanan Dan Tingkat Suku Bunga Kredit Terhadap Kepuasan Nasabah (Studi Kasus Nasabah Kantor Pusat Koperasi LPN Multi Usaha Di Nagari Kurnia Selatan)”. Innovative: Journal Of Social Science Research, vol. 3, no. 5, Oct. 2023, pp. 4276-88, http://j-innovative.org/index.php/Innovative/article/view/5386.