ARISANDRA, Martha Laila; KUSUMA , Nanda Nanta. OPTIMIZATION OF SHARIAH-BASED DIGITAL MARKETING STRATEGY TO INCREASE SMARTFREN BRAND LOYALTY THROUGH CUSTOMER ENGAGEMENT ACCORDING TO ISLAMIC ECONOMIC CONCEPT. ADILLA : Jurnal Ilmiah Ekonomi Syari’ah, [S. l.], v. 9, n. 1, p. 180–203, 2026. Disponível em: https://ejournal.unisda.ac.id/index.php/adilla/article/view/7177. Acesso em: 4 jun. 2026.