Universitas Indonesia, 1992
UI - Skripsi (Membership)
Universitas Indonesia, 1985
UI - Skripsi (Membership)
Universitas Indonesia, 2000
UI - Skripsi (Membership)
Universitas Indonesia, 1999
UI - Skripsi (Membership)
Universitas Indonesia, 1987
UI - Skripsi (Membership)