?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Witra&rft.aulast=Oktavia&rft.au=Oktavia%2C+Witra&rft.inst=Universitas+Negeri+Padang&rft.title=An+Analysis+of+Argumentative+Elements+dan+Fallacies+in+Student'+Discussion+Essays&rft.degree=Masters%2FTesis&rft.date=September+2014