Lancaster, F. Wilfrid
John Wiley & Sons, 1979
Buku Teks
Williams, William F.
Business Press, 1968
Buku Teks
Baeza-Yates, Ricardo
Addison-Wesley , 1999
Buku Teks
edited by Morris Rubinoff
Spartan Books , 1965
Buku Teks
Salton, Gerard
McGraw-Hill, 1983
Buku Teks