?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Fitrah%2C+Dwi+Fadillah&rft.aufirst=Dwi+Fadillah&rft.aulast=Fitrah&rft.inst=Universitas+Pakuan&rft.degree=Skripsi&rft.title=Persiapan+Model+Problem+Based+Learning+dalam+Meningkatkan+Keterampilan+Menulis+Surat+Dinas+pada+Siswa+Kelas+VII+MTS+Al-Abror+Kota+Bogor.&rft.date=2020