Barrante, James R.
Pearson Prentice Hall, 2004
Buku Teks
Friedman, Avner
Society for Industrial and Applied Mathematics, 1994
eBooks
Novak, David
D.C. Health , 1989
Buku Teks
Hirst, D.M.
Macmillan, 1976
Buku Teks
Armstrong, James W.
Macmillan, 1976
Buku Teks