Report copyright - DAFTAR PUSTAKA - UPNVJrepository.upnvj.ac.id/2091/9/DAFTAR PUSTAKA.pdfJurnal Bisnis dan Ekonomi (JBE), September 2008, Hal. 128 – 14 Vol. 15, No.2 Sugiyono. (2016). Metode Penelitian
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