?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aulast=Sari&rft.au=Sari%2C+Dewi+Ayu+Wulan&rft.aufirst=Dewi+Ayu+Wulan&rft.inst=Universitas+Negeri+padang&rft.degree=Bachelor%2FSkripsi&rft.date=May+2013&rft.title=The+Use+of+Cs+By+Math+And+Natural+Science+Teachers+and+Student%E2%80%99s+Perception+Toward+It+At+Rsmabi+3+Padang