edited by John Angel, Ian Walden
Blackstone Press, 1997
Buku Referensi
edited by John Angel and Ian Walden
Blackstone Press, 1997
Buku Teks
Green, James H., author
Irwin, 1992
Buku Referensi
edited by Ian Walden.
Oxford University Press, 2012
Buku Teks
Kennedy, Charles H., author
Artech House, 1996
Buku Teks