Devlin, Keith
Chapman & Hall, 1992
Buku Teks
Grenander, Ulf, author
John Wiley & Sons, 1981
Buku Teks
Wade, William R., author
Prentice-Hall, 1995
Buku Teks
Walpole, Ronald E., author
Macmillan, 1968
Buku Teks
Beals, Richard
Springer-Verlag, 1980
Buku Teks