?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=SAHRONI%2C+1423053051&rft.aulast=SAHRONI&rft.aufirst=1423053051&rft.degree=Masters&rft.date=23+Oktober+2017&rft.title=PENGEMBANGAN+LEMBAR+KERJA+SISWA+MODEL+PROBLEM+BASED+LEARNING+PADA+PEMBELAJARAN+IPA+MATERI+GAYA+KELAS+IV+SD+&rft.inst=UNIVERSITAS+LAMPUNG