http://repository.uhamka.ac.id/id/eprint/10252/
Kusmajid, Kusmajid
http://repository.uhamka.ac.id/id/eprint/10252/1/PKN%202F.pdf
http://repository.uhamka.ac.id/id/eprint/10252/
Kusmajid, Kusmajid
http://repository.uhamka.ac.id/id/eprint/10252/1/PKN%202F.pdf