Universitas Indonesia, 1990
UI - Skripsi (Membership)
Situmorang, Thomson
Universitas Indonesia, 2002
UI - Skripsi (Membership)
Damanik, Rachmaihut
Universitas Indonesia, 1995
UI - Skripsi (Membership)
Universitas Indonesia, 2002
UI - Skripsi (Membership)
Saragi, Eva Mayasari
Universitas Indonesia, 1998
UI - Skripsi (Membership)