Schmitt, Bernard A.
Westview Press, 1979
Buku Teks
Brandt, Willy, author
Victor Gollancz , 1986
Buku Teks
Burnell, Peter J.
Westview Press, 1986
Buku Teks
Garst, Jonathan
Random House, 1963
Buku Teks
edited by Ray Bromley, Chris Gerry
John Wiley & Sons, 1979
Buku Teks