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