?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.au=Eri+Purwanti%2C+1323031038&rft.aulast=Eri+Purwanti&rft.aufirst=1323031038&rft.degree=Masters&rft.date=4+Mei+2015&rft.title=PENGEMBANGAN+INSTRUMEN+KETERAMPILAN+SOSIAL+BERBASIS+OBSERVASI+DAN+SOSIOMETRI+DALAM+PEMBELAJARAN+IPS&rft.inst=UNIVERSITAS+LAMPUNG