?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Nurul+Jannah&rft.aufirst=Amirul&rft.au=Nurul+Jannah%2C+Amirul&rft.title=Proceeding+of+International+Conference+On+Research%2C+Implementation+And+Education+Of+Mathematics+And+Sciences+2014&rft.date=May+2014&rft.atitle=DEVELOPMENT+AND+VALIDATION+OF+PHYSICAL+CLASSROOM+LEARNING+ENVIRONMENT+INSTRUMENT+(PCLEI)+FOR+SECONDARY+SCHOOL+IN+MALAYSIA&rft.genre=article