Poole, Charles P., author
John Wiley & Sons, 2003
Buku Teks
Ratner, Mark, author
Prentice-Hall, 2008
Buku Teks
Jones, Richard A. L.
Oxford University Press, 2007
Buku Teks
Hall, J. Storrs, author
Prometheus Books, 2005
Buku Teks
Gabor L. Hornyak
CRC Press, Taylor & Francis Group, 2009
Buku Teks