http://repository.uhamka.ac.id/id/eprint/14849/ Perancangan Mesin Pemotong Batang Sereh Marifatullah, Hafizh Awaludin http://repository.uhamka.ac.id/id/eprint/14849/1/digital_7229-eSTM-2017001%20Hafizh%20Awaludin%20Marifatullah.pdf Unduh!