JULIAWATI, J.; ADI SANTOSO; SRI HARTONO. PENGARUH KUALITAS PRODUK, HARGA DAN PROMOSI TERHADAP KEPUTUSAN PEMBELIAN PRODUK SMARTPHONE MEREK OPPO DI PONOROGO. JEMBA: JURNAL EKONOMI, MANAJEMEN, BISNIS DAN AKUNTANSI, [S. l.], v. 2, n. 4, p. 549–562, 2023. Disponível em: https://www.bajangjournal.com/index.php/JEMBA/article/view/6141. Acesso em: 19 aug. 2025.