surat und FEB uhamka 2018, materi
http://repository.uhamka.ac.id/4367/
Bambang, Dwi Hartono
http://repository.uhamka.ac.id/4367/1/surat%20und%20FEB%20uhamka%202018%2C%20materi.pdf
Bambang, Dwi Hartono surat und FEB uhamka 2018, materi. Documentation. MM Uhamka. (Unpublished)
