?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Andrews&rft.au=Andrews%2C+Richard&rft.aufirst=Richard&rft.atitle=Models+of+argumentation+in+educational+discourse&rft.title=Text&rft.volume=25&rft.pages=107-127&rft.date=January+2005&rft.issue=1&rft.issn=0165-4888&rft.genre=article