Tambunan, Partomuan, author
Universitas Indonesia, 1998
UI - Tesis (Membership)
Sumantri, author
Program Pascasarjana Universitas Indonesia, 1999
UI - Tesis (Membership)
Ismet Lubis, author
1995
UI - Tesis (Membership)
Siboro, Jules, author
Universitas Indonesia, 1998
UI - Tesis (Membership)
Universitas Indonesia, 1985
UI - Skripsi (Membership)