?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Kristiyanto%2C+Wahyu+Hari&rft.aulast=Kristiyanto&rft.aufirst=Wahyu+Hari&rft.issn=978-979-96880-8-8&rft.title=Proceeding+of+International+Conference+On+Research%2C+Implementation+And+Education+Of+Mathematics+And+Sciences+2015+(ICRIEMS+2015)%2C+Yogyakarta+State+University%2C+17-19+May+2015&rft.atitle=THEORETICAL+REVIEW%3A+THE+OBSERVATION+FOR+THINKING+PROCESS+BY+PIAGET%E2%80%99S+THEORY+THROUGH+MEDIA+LEARNING+PHYSICS%E2%80%99S+ANIMATION&rft.genre=article