Erna Dewayani, author
Universitas Indonesia, 2006
UI - Tesis (Membership)
Gunawan Widjaja, author
Kencana Prenada Media Group, 2006
Buku Teks
Gunawan Widjaja, author
Kencana, 2006
Buku Teks
Gunawan Widjaja, author
Kencana Prenada Media, 2009
Buku Teks
Siahaan, Sihar S., author
Universitas Indonesia, 1997
UI - Skripsi (Membership)