Hansen, David A.
Marcel Dekker, Inc, 1996
Buku Teks
Mamlouk, Michael S.
Pearson Prentice Hall, 2006
Buku Teks
Marotta, Theodore W.
Pearson - Prentice Hall, 2005
Buku Teks
Marotta, Theodore W.
Prentice-Hall, 1997
Buku Teks
Ahmed, Ash
Routledge, 2015
Buku Teks