Gunawan Widjaja, author
Kencana Prenada Media, 2009
Buku Teks
Gunawan Widjaja, author
Kencana, 2006
Buku Teks
Gunawan Widjaja, author
Kencana Prenada Media Group, 2006
Buku Teks
Indah Asri Maya, author
Universitas Indonesia, 2006
UI - Tesis (Membership)
Wardah, author
2004
UI - Tesis (Membership)