Zulfahmi, author
Universitas Indonesia, 2008
UI - Tesis (Open)
Michael, P., author
UI-Press, 1994
Buku Teks
Universitas Indonesia, 1990
UI - Skripsi (Membership)
Gunadi, author
MUC , 2004
Buku Teks
Harun M. Husein, author
Rineka Cipta, 1991
Buku Teks