?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Tomi+Putra&rft.aulast=Wijaya&rft.au=Wijaya%2C+Tomi+Putra&rft.atitle=Meta-Analysis+of+The+Effect+of+Problem+Based+Learning+Model+on+Understanding+Physics+Concepts+of+High+School+Students&rft.date=2021&rft.issn=ISSN+%3A+print+%3A+1978-502X+dan+online&rft.title=Jurnal+Geliga+Sains+(JGS)%3AJurnal+Pendidikan+Fisika&rft.volume=9&rft.issue=1&rft.pages=26-34&rft.genre=article