Helmi, Helmi, Nurwati Nurwati, Mohamad Haviz Maualana Razak, & Nurlis Azhar. " Pengaruh direct marketing dan personal selling apartemen wang residence terhadap keputusan pembelian konsumen pada PT. Citicon Propertindo." Journal of Information System, Applied, Management, Accounting and Research [Online], 7.1 (2023): 80-88. Web. 5 Jul. 2025