http://repository.uhamka.ac.id/4368/ Bambang, Dwi Hartono http://repository.uhamka.ac.id/4368/1/surat%20undangan%2C%20materi%20%20SDN%2001%20juli%202019%2034.pdf Bambang, Dwi Hartono surat undangan, materi SDN 01 juli 2019 34. Documentation. MM Uhamka. (Unpublished) Silahkan Download Disini!