The Effect of Product Quality, Brand Trust, Price and Sales Promotion on Purchase Decisions on Royal Residence Surabaya (Case Study in PT. Propnex Realti Visit) - Rahmawati, Yuni; Nilowardono, Sengguruh (IJIEEB International Journal of Integrated Education, Engineering and Business eISSN 2615-1596 pISSN 2615-2312, 2018)