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Sabil, Muhammad Akbar Hanif Ibnu (2025) Pengaruh Promotion Strategy, Content Marketing dan Kualitas Layanan Terhadap Loyalitas Member GYMALE Di Surabaya. (The Influence of Promotion Strategy, Content Marketing, and Service Quality on GYMALE Member Loyalty in Surabaya). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.