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Putra, Rakmat Dwi Anugrah (2024) Word Of Mouth Dan Personal Selling Untuk Meningkatkan Purchase Decision Produk Beton Readymix Melalui Competitive Advantage Dan Corporate Trust Pada PT. Varia Usaha Beton Di Gresik. (Word Of Mouth and Personal Selling to Increase Purchase Decision of Ready-Mix Concrete Products Through Competitive Advantage and Corporate Trust at PT. Varia Usaha Beton in Gresik). Masters thesis, Universitas 17 Agustus 1945 Surabaya.