?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Yoppy+Wahyu&rft.au=Purnomo%2C+Yoppy+Wahyu&rft.aulast=Purnomo&rft.atitle=A+Scale+for+Measuring+Teachers'+Mathematics-Related+Beliefs%3A+A+Validity+and+Reliability+Study&rft.issue=2&rft.volume=10&rft.title=International+Journal+of+Instruction&rft.date=2017&rft.pages=23-38&rft.genre=article