Putra, L. D., and E. H. Susanto. “Pengaruh Marketing Mix 4P Dan Perceived Quality Terhadap Purchase Decision Smartphone Vivo”. Jurnal Manajemen Bisnis Dan Kewirausahaan, vol. 3, no. 6, Nov. 2019, pp. 77-82, doi:10.24912/jmbk.v3i6.6101.