Peck, Roxy.
Cebgage Learning, 2016
Buku Teks
Anderson, Alan J.B.
Chapman and Hall , 1989
Buku Teks
Mosteller, Frederick
Addison Wesley Publ., 1983
Buku Teks
McClave, James T.
Dellen Publishing, 1979
Buku Teks
Hays, William Lee, 1926-1995
Harcourt Brace Colege, 1994
Buku Teks