Winarni, E., and N. Jamianto. “PENGARUH MARKETING MIX TERHADAP KEPUTUSAN PEMBELIAN PRODUK JASA PADA VILLA XYZ MALANG”. Yos Soedarso Economic Journal (YEJ), vol. 1, no. 1, Apr. 2019, pp. 12-19, https://ejurnal.uniyos.ac.id/index.php/ysej-server/article/view/yej1103.