Makinson, David, author
Springer, 2012
eBooks
Giannasi, Frank
Longman Group Limited, 1995
Buku Teks
Maier, David, author
The Benjamin Cumming Pub., 1988
Buku Teks
Klir, George J., author
Prentice-Hall, 1995
Buku Teks
Devlin, Keith
Chapman & Hall, 1992
Buku Teks