Savitz, Leonard D., author
John Wiley & Sons, 1978
Buku Teks
edited by David S. Wall
Routledge, 2001
Buku Teks
Windlesham, Lord, author
Clarendon Press, 1996
Buku Teks
Slapper, Gary, author
Longman , 1999
Buku Teks
Chisum, W. Jerry, author
Academic Press/Elsevier, 2011
Buku Teks