Universitas Indonesia, 2002
UI - Skripsi (Membership)
Nababan, Gistang Richard, author
Universitas Indonesia, 2001
UI - Skripsi (Membership)
Universitas Indonesia, 2003
UI - Skripsi (Membership)
Universitas Indonesia, 2002
UI - Skripsi (Membership)
Aritonang, Robert Edward, author
2008
UI - Tesis (Open)