?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Yoppy+Wahyu&rft.au=Purnomo%2C+Yoppy+Wahyu&rft.aulast=Purnomo&rft.issue=1&rft.atitle=Incomprehension+of+the+Indonesian+Elementary+School+Students+on+Fraction+Division+Problem&rft.volume=8&rft.pages=57-74&rft.title=Infinity&rft.date=2019&rft.genre=article