?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Ima+Mulyawati&rft.au=Ima+Mulyawati%2C+IM&rft.aufirst=IM&rft.title=GSCE%3A+Global+Sustainability+and+Community+Engagement&rft.atitle=Implementation+of+Concrete+Media+in+Improving+Numeracy+Skills+in+Elementary+Schools&rft.genre=article