Weiss, Alan, author
John Wiley & Sons, 2009
Buku Referensi
Payne, James, author
Illinois National Textbook, 1994
Buku Teks
Davis, William S., author
Addison-Wesley , 1988
Buku Teks
Olsen, Gary, author
Ohio North Light Books , 1997
Buku Teks
Rougier, Harry, author
W.W. Norton, 1970
Buku Teks