SafitrianiL., ArimbawaI. G., BaktionoA. and DamayantiE. (2020) “ANALYSIS OF PRODUCT QUALITY, SALES PROMOTION, BRAND IMAGES, AND AFTER-SALES SERVICE TOWARDS SAMSUNG GADGET PURCHASE DECISIONS”, IJEEIT : International Journal of Electrical Engineering and Information Technology, 2(2), pp. 1-9. doi: 10.29138/ijeeit.v2i2.1152.