Carlborg, Frank W.
Scoott, Foresman, 1968
Buku Teks
Wasserman, Larry, author
Springer, 2010
Buku Teks
Kapadia, Asha Seth, author
Chapman & Hall/CRC, 2005
Buku Teks
edited by Jerzy Neyman
University of California Press , 1956
Buku Teks
Brase, Charles Henry.
D.C. Heath, 1991
Buku Teks