Hutapea, Mangontua Parningotan, author
1987
UI - Skripsi (Membership)
Sihombing, Partahi, author
1986
UI - Skripsi (Membership)
Tjahjo Damirin, author
1986
UI - Skripsi (Membership)
Universitas Indonesia, 1984
UI - Skripsi (Membership)
Iskandar Mugni, author
Universitas Indonesia, 1984
UI - Skripsi (Membership)