?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=Monica+Prima&rft.aulast=Sari&rft.au=Sari%2C+Monica+Prima&rft.atitle=Studi+Kesulitan+Belajar+Mahasiswa+Jurusan+Pendidikan+IPA+dalam+Mempelajari+Sifat+Periodik+Unsur&rft.date=May+2020&rft.issn=print+%3A+2614-1221+dan+online+%3A+2579-860X&rft.title=Jurnal+Eksakta+Pendidikan+(JEP)&rft.volume=4&rft.issue=1&rft.pages=18-26&rft.genre=article