Sitorus, A.E.B., author
Universitas Indonesia, 1986
UI - Skripsi (Membership)
Sinambela, Paingot, author
Universitas Indonesia, 2001
UI - Skripsi (Membership)
penyusun, Topo Santoso ... [et al.]
Harakatuna, 2005
Buku Teks
Moh. Koesnoe, author
Ushara Press, 1998
Buku Teks
Eko Harry Susanto, author
1996
UI - Tesis (Membership)