Fredereca, Bunga Geofanny, and Chairy Chairy. 2010. “Pengaruh Psikologi Konsumen Terhadap Keputusan Pembelian Kembali Smartphone Blackberry”. Jurnal Manajemen Teori Dan Terapan| Journal of Theoretical and Applied Management 3 (2). https://doi.org/10.20473/jmtt.v3i2.2397.