?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Herlina&rft.aulast=Herlina&rft.au=Herlina%2C+Herlina&rft.inst=Universitas+Negeri+Padang&rft.title=Analisis+Proses+Pembelajaran+dan+Pemahaman+Siswa+pada+Materi+Larutan+Penyangga+di+Kelas+XI+IPA+SMA+Negeri+1+Siak&rft.degree=Masters%2FTesis&rft.date=17+June+2013