Memah, Miraikel, et al. “Pengaruh Produk Dan Promosi Terhadap Keputusan Pembelian Di 3Second Mantos Manado”. Productivity, vol. 3, no. 5, Aug. 2022, pp. 433-8, https://ejournal.unsrat.ac.id/v3/index.php/productivity/article/view/44950.