Freund, John E., author
Pearson Prentice Hall, 2007
Buku Teks
Venables, W.N., author
Springer-Verlag, 1994
Buku Teks
Freund, John E., author
Prentice Hall Inc., 1973
Buku Teks
Conover, W.J., author
Wiley, 1983
Buku Teks
Lapin, Lawrence L., author
Harcourt Brace Jovanovich, 1990
Buku Teks