Metode Customer Satisfaction Index (CSI) dan QRCode Pada Aplikasi Penjualan Produk Alat Elektronik PT. Metro Cash & Credit Medan . snd [Internet]. 2025 Feb. 4 [cited 2026 Oct. 12];1(1):524-36. Available from: https://senadimu.potensi-utama.org/index.php/home/article/view/116