Handika, Willy, Siti Mabrur Rachmah, and Nurhayati S. “PENGARUH LAYANAN PURNA JUAL DAN KUALITAS PRODUK TERHADAP KEPUASAAN PELANGGAN SMARTPHONE SAMSUNG DI JAKARTA”. Global Research and Innovation Journal 2, no. 3 (September 19, 2026): 671–681. Accessed September 19, 2026. https://journaledutech.com/index.php/great/article/view/1571.