Simbolon, Parasian, author
Universitas Indonesia, 2000
UI - Skripsi (Membership)
Rita Triastuti, author
Universitas Indonesia, 2002
UI - Tesis Membership
Universitas Indonesia, 1985
UI - Skripsi (Membership)
Universitas Indonesia, 1996
UI - Skripsi (Membership)
Tampubolon, David, author
Universitas Indonesia, 2001
UI - Skripsi (Membership)