?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Yessy+Purnama&rft.au=22104850%2C+Yessy+Purnama&rft.aulast=22104850&rft.date=July+2014&rft.title=SISTEM+REKOMENDASI+URUTAN+PENUKARAN+MATA+UANG+MENGGUNAKAN+METODE+BELLMAN-FORD+BERBASIS+OBSERVER+PATTERN&rft.degree=Bachelor&rft.inst=Universitas+Kristen+Duta+Wacana&rft.tpages=53