Huntley, James R., author
NATO Information Service, 1972
Buku Teks
Oxford University Press, 1997
Buku Teks
Rowland, Anthony J.
Edward Arnold, 1985
Buku Teks
by Kenneth A. Dahlberg [and others]
Duke University Press, 1985
Buku Teks
Bell, Stuart, author
Blackstone Press, 2001
Buku Teks