"New York: Andromedia Oxford, 1994.",
Buku Teks
Blum, Mark
Chronicle Books, 1999
Buku Referensi
Zug, George R.
Academic Press, 1993
Buku Teks
Rothschild, Bruce M.
Springer, 2012
eBooks
editors, Tim Halliday, Kraig Adler, Christopher O'toole
Grolier International, 1993
Buku Referensi