Mendenhall, William
Duxbury Press, 1981
Buku Teks
Devore, Jay L.
Springer, 2012
eBooks
Larsen, Richard J.
Prentice-Hall, 1996
Buku Teks
Shorack, Galen R.
Society for Industrial and Applied Mathematics, 2009
eBooks
Kapadia, Asha Seth
Chapman & Hall/CRC, 2005
Buku Teks