?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=22084540%2C+Felix+Febrianto+Samuel+Siregar&rft.aufirst=Felix+Febrianto+Samuel+Siregar&rft.aulast=22084540&rft.degree=Final+Year+Projects+(S1)&rft.title=SISTEM+WATERMARK+DENGAN+METODE+BUTTERFLY+FFT+PADA+FILE+WAV&rft.tpages=32&rft.date=November+2014&rft.inst=Universitas+Kristen+Duta+Wacana