http://repository.uhamka.ac.id/2732/2/Yadi%20Absensi%20Akt4U.pdf
http://repository.uhamka.ac.id/2732/
Nurhayadi, Yadi
http://repository.uhamka.ac.id/2732/2/Yadi%20Absensi%20Akt4U.pdf
http://repository.uhamka.ac.id/2732/
Nurhayadi, Yadi
http://repository.uhamka.ac.id/2732/2/Yadi%20Absensi%20Akt4U.pdf