?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=RONAL&rft.aulast=22104989&rft.au=22104989%2C+RONAL&rft.date=July+2015&rft.tpages=39&rft.title=MENGIMPLEMENTASIKAN+QUADTREE+UNTUK+MENGOPTIMALKAN+COLLISION+DETECTION&rft.degree=Bachelor&rft.inst=Universitas+Kristen+Duta+Wacana