?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Hartini&rft.aufirst=Tri+Isti&rft.au=Hartini%2C+Tri+Isti&rft.title=INTERNATIONAL+JOURNAL+OF+SCIENTIFIC+%26+TECHNOLOGY+RESEARCH&rft.atitle=Enhancing+Conceptual+Understanding+and+Critical+Thinking+Skills+Pre-service+of+Physics+Using+Mechanics+Multi+Representation+(MMR)&rft.genre=article