Allen, Edward, author
John Wiley & Sons, 2012
Buku Teks
Stout, David F., author
McGraw-Hill, 1980
Buku Referensi
Diman, Paz, author
BooQs, 2009
Buku Referensi
Chrest, Anthony P.
Van Nostrand Reinhold, 1989
Buku Teks
Niederst, Jennifer, author
O`Reilly, 1999
Buku Teks