http://repository.uhamka.ac.id/id/eprint/15733/
5._2019.02.19_Pradipta_2018_J._Phys.__Conf._Ser._948_012071.pdf Turnitin
Trisna Roy Pradipta, TRP
http://repository.uhamka.ac.id/id/eprint/15733/1/5._2019.02.19_Pradipta_2018_J._Phys.__Conf._Ser._948_012071.pdf.pdf