Universitas Indonesia, 1990
UI - Skripsi (Membership)
Siregar, Zofrullah, author
Universitas Indonesia, 1992
UI - Skripsi (Membership)
Julianti Tri Astuti, author
1989
UI - Skripsi (Membership)
Universitas Indonesia, 1992
UI - Skripsi (Membership)
Universitas Indonesia, 1991
UI - Skripsi (Membership)