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Khotimah, Husnul (2024) Pengaruh Product Knowledge dan Relationship Marketing Terhadap Loyalitas Konsumen Sepeda Motor di Dealer Yamaha SIP Gunungsari. (The Influence of Product Knowledge and Relationship Marketing on Motorcycle Consumer Loyalty at Yamaha SIP Gunungsari Dealers). Undergraduate thesis, Universitas 17 Agustus 1945 Surabaya.