Delgado, Richad
Thomson/West, 2008
Buku Teks
Oppenheim, S. Chesterfield
Little, Brown , 1971
Buku Teks
Aggi Tjetje, author
1991
UI - Tesis (Membership)
Lobenthal, Joseph S.
Outerbridge & Dienstfrey, 1970
Buku Teks
Feld, barry c., author
Thomson/West, 2009
Buku Teks