?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Pujianto&rft.au=Pujianto&rft.atitle=KAJIAN+SISTEM+ALARM+PEKA+CAHAYA+MENGGUNAKAN+TRANSISTOR+dan+Op-Amp+741&rft.date=8+February+2005&rft.title=Seminar+Nasional+Penelitian%2C+Pendidikan+%26+Penerapan+MIPA+2005&rft.issn=979-96880-4-3&rft.genre=article