Universitas Indonesia, 2003
UI - Skripsi (Membership)
Universitas Indonesia, 2001
UI - Skripsi (Membership)
Universitas Indonesia, 2002
UI - Skripsi (Membership)
Silitonga, Desmon Roy B., author
Universitas Indonesia, 2004
UI - Skripsi (Membership)
Sinaga, Fiter Ubrin, author
Universitas Indonesia, 1996
UI - Skripsi (Membership)