?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adissertation&rft.aufirst=Oktian+Fajar&rft.au=Nugroho%2C+Oktian+Fajar&rft.aulast=Nugroho&rft.degree=S1&rft.title=THE+EFFECT+OF+POSTER+PRESENTATION+TOWARDS+STUDENTS%E2%80%99+CREATIVITY+AND+CONCEPT+COMPREHENSION+ABOUT+POLLUTION+CONCEPT&rft.date=28+November+2013&rft.inst=Universitas+Pendidikan+Indonesia