?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Laksanawati%2C+Wahyu+Dian&rft.aulast=Laksanawati&rft.aufirst=Wahyu+Dian&rft.title=The+effect+of+using+google+classroom+on+students%E2%80%99+mastery+of+physics+concepts+through+the+discovery+learning+model&rft.atitle=The+effect+of+using+google+classroom+on+students%E2%80%99+mastery+of+physics+concepts+through+the+discovery+learning+model&rft.genre=article