“Pengaruh Variasi Produk, Word Of Mouth, Promosi Dan Layanan Purna Jual Terhadap Keputusan Pembelian”. Journal of Economics, Management, and Business 5, no. 2 (July 29, 2026): 46–58. Accessed August 31, 2026. https://ojs.unsiq.ac.id/index.php/magna/article/view/12420.