Surya, Ade Permata. “CUSTOMER LOYALTY FROM PERSPECTIVE OF MARKETING MIX STRATEGY AND CUSTOMER SATISFACTION A Study from Grab - Online Transportation in Era of Industrial Revolution 4.0”. MIX: JURNAL ILMIAH MANAJEMEN, vol. 9, no. 3, Nov. 2019, pp. 394-06, https://publikasi.mercubuana.ac.id/index.php/Jurnal_Mix/article/view/5608.