Gothmann, William H.
Prentice-Hall, 1982
Buku Teks
Venables, John A., author
Cambridge University Press, 2000
Buku Teks
Stuart, R.V., author
Academic Press, 1983
Buku Teks
Valid, R.
John Wiley & Sons, 1995
Buku Teks
O`Brien, Dan, author
Polity Press, 2006
Buku Teks