Report copyright - BAB II TINJAUAN PUSTAKA - digilib.uinsby.ac.iddigilib.uinsby.ac.id/11332/5/Bab2.pdf · 13 Philip Kotler & Gery Amstrong, Prinsip-prinsip, 6. 14 Fandy Tjiptono, Pemasaran Jasa, 3
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