Mauliza RA, Suparta IM. The Effect of Product Quality, Price, Distribution and Promotion on Demand for Xiaomi Smartphone in Surabaya. eCo-Buss [Internet]. 2024 Dec. 22 [cited 2024 Dec. 23];7(2):1458-67. Available from: https://jurnal.kdi.or.id/index.php/eb/article/view/1916