http://repository.uhamka.ac.id/id/eprint/10253/
Kusmajid, Kusmajid
http://repository.uhamka.ac.id/id/eprint/10253/1/PTK%206C.pdf
Jurnal Ilmiah Fakultas Teknik
http://repository.uhamka.ac.id/id/eprint/10253/
Kusmajid, Kusmajid
http://repository.uhamka.ac.id/id/eprint/10253/1/PTK%206C.pdf