?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Soebagyo&rft.au=Soebagyo%2C+Joko&rft.aufirst=Joko&rft.atitle=Exploration+of+Ethnomathematics+in+Umpet+Batu+Game&rft.title=Unnes+Journal+of+Mathematics+Education&rft.pages=88-97&rft.issue=2&rft.volume=14&rft.genre=article