“PENGARUH PROMOTION STRATEGY, CONTENT MARKETING, DAN KUALITAS LAYANAN TERHADAP LOYALITAS MEMBER GYMALE DI SURABAYA” (2026) Musytari : Jurnal Manajemen, Akuntansi, dan Ekonomi, 25(2), pp. 1331–1340. Available at: https://ejournal.cibinstitut.com/index.php/musytari/article/view/5901 (Accessed: 24 October 2026).