Putra, Liandri Darma, and Eko Harry 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.