http://repository.uhamka.ac.id/id/eprint/13435/ Proceding Curriculum Berbasis 4.0 Muljono, Hery http://repository.uhamka.ac.id/id/eprint/13435/1/Proceding%20The%20Development%20in%20the%20Industrial%20Revolution%20ERA%20%24.0.pdf Unduh!