Schuster R.
Berlin; New York Springer-Verlag 1990,
Buku Teks
Rodriguez, Walter, author
McGraw-Hill, 1992
Buku Teks
Farin, Gerald, author
Morgan Kaufmann , 2002
Buku Teks
Bethune, James D., author
Prentice-Hall, 1990
Buku Referensi
Lueptow, Richard M., author
Prentice-Hall, 2000
Buku Teks