Schwedt, Georg, author
John Wiley & Sons, 2001
Buku Referensi
O`Hanlon, John F., author
John Wiley & Sons, 1980
Buku Teks
Griffith, H. Winter, author
Fisher Books, 1998
Buku Teks
Murphy, Beverly, author
McGraw-Hill, 2005
Buku Referensi
Capehart, Barney L.
The Fairmont Press, Inc., 2008
Buku Teks