Albar, A. H., and A. Baktiono. “PRICE RELATIONSHIP ANALYSIS, PROMOTION AND SERVICE QUALITY TO IMPROVE CUSTOMER LOYALTY IN CLOTING HARDWARE AT TUNJUNGAN PLAZA SURABAYA”. Jurnal Ekonomi, Vol. 19, no. 1, Dec. 2018, pp. 15 -23, doi:10.29138/je.v19i1.56.