Saputri, Ridhoi Nurmalatyas, and Burhannudin. “Pengaruh Promosi, Kualitas Produk Dan Keragaman Produk Terhadap Keputusan Pembelian Handphone Vivo”. JURNAL WIDYA GANECWARA 10, no. 4 (November 26, 2020). Accessed April 20, 2025. http://ejournal.utp.ac.id./index.php/JWG/article/view/1222.