Casti, John L., author
Univesity of East London Library, 1994
Buku Teks
Banerjee, Santo, editor
Springer, 2012
eBooks
Sanders, T. Irene, author
The Free Press, 1998
Buku Teks
Devaney, Robert L., author
Addison-Wesley, 1990
Buku Teks
Sardar, Ziauddin, author
Icon Books, 2000
Buku Teks