?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=.&rft.aulast=Susilahudin+Putrawangsa1%2C+Monica+Wijers2+Agung+Lukito3%2C+Siti+M+A&rft.au=Susilahudin+Putrawangsa1%2C+Monica+Wijers2+Agung+Lukito3%2C+Siti+M+A%2C+.&rft.issn=978-602-1037-00-3&rft.title=International+Seminar+on+Innovation+in+Mathematics+and+Mathematics+Education&rft.date=2014&rft.atitle=Educational+Design+Research%3A+Developing+Students%E2%80%99+Understanding+Of+Measurement+Units+Of+Area&rft.genre=article