?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Haryadi&rft.au=Haryadi%2C+Rudi&rft.aufirst=Rudi&rft.atitle=Interactive+Math+E-Book%3A+An+Alternative+Learning+Resources+for+21st+Century+Learners&rft.title=Interactive+Math+E-Book%3A+An+Alternative+Learning+Resources+for+21st+Century+Learners&rft.genre=article