?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Cholis+&rft.au=Cholis+%2C+Sa%E2%80%99dijah&rft.aufirst=Sa%E2%80%99dijah&rft.issn=978-979-16353-7-0&rft.title=PROCEEDINGS+International+Seminar+and+the+Fourth+National+Conference+on+Mathematics+Education&rft.date=2011&rft.atitle=Students%E2%80%99+Achievement+In+Developing+Instructional+Material+Of+Junior+High+School+Mathematics+In+English+Through+Implementation+Of+Peer+Assesment+In+Cooperative+Setting&rft.genre=article