Gunawan Widjaja, author
[s.n.], [s.a.]
Buku Teks
Gunawan Widjaja, author
Kencana Prenada Media, 2008
Buku Teks
Gunawan Widjaja, author
Kencana Prenada Media Group, 2006
Buku Teks
Ginting, Ramlan, 1956-, author
Salemba Empat, 2002
Buku Teks
Ginting, Ramlan, 1956-, author
Universitas Trisakti, 2000
Buku Teks