?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=0713021036%2C+MARYATI&rft.aulast=0713021036&rft.aufirst=MARYATI&rft.date=23+Januari+2016&rft.atitle=KEEFEKTIFAN+PENGGUNAAN+MODEL+PEMBELAJARAN+KOOPERATIF+TIPE+NUMBERED+HEADS+TOGETHER+DENGAN+PEMANFAATAN+LKS+&rft.title=Digilib+Library&rft.genre=article