Universitas Pendidikan Indonesia, 2011
Majalah, Jurnal, Buletin
Johanes, Herman
Universitas Gadjah Mada , 1974
Buku Teks SO
Petrucci
Erlangga, 2011
Multimedia
Petrucci
Erlangga, 2011
Multimedia
Petrucci, Ralph H.
[Publisher not identified], [Date of publication not identified]
Buku Teks SO