gunaputra, wiriyadhika, Fefe Ali Sugito, and Syamsul Adha. “CAUSAL RELATIONSHIP BETWEEN PERCEIVED QUALITY, PRICE, AND BRAND IMAGE ON CUSTOMER LOYALTY (CASE STUDY IN PANTENE SHAMPO IN SURABAYA CITY)”. JURNAL EKSEKUTIF 15, no. 2 (January 7, 2019): 371-387. Accessed August 9, 2020. http://jurnal.ibmt.ac.id/index.php/jeksekutif/article/view/199.