Universitas Indonesia, 2002
UI - Skripsi (Membership)
Universitas Indonesia, 2005
UI - Skripsi (Membership)
Universitas Indonesia, 2006
UI - Skripsi (Membership)
Universitas Indonesia, 2005
UI - Skripsi (Membership)
Siagian, Johanes Benhard
Universitas Indonesia, 2003
UI - Skripsi (Membership)