Batubara, Cosmas, author
2002
UI - Disertasi (Membership)
Pardosi, Kartini, author
2007
UI - Tesis (Membership)
Achmad Ruslan, author
Universitas Indonesia, 1997
UI - Tesis (Membership)
Marpaung, Happy, author
Binacipta, 1987
Buku Teks
Larobu, Abraham, author
Universitas Indonesia, 1996
UI - Tesis (Membership)