Kline, Morris, author
Thomas Y Crowell, 1959
Buku Teks SO
Barrante, James R., author
Pearson Prentice Hall, 2004
Buku Teks
Friedman, Avner, author
Society for Industrial and Applied Mathematics, 1994
eBooks
Novak, David, author
D.C. Health , 1989
Buku Teks
Hirst, D.M., author
Macmillan, 1976
Buku Teks