Hickey, Gerald Connon
Yale University Press, 1967
Buku Teks
Trager, Frank N.
Frederick A. Praeger, 1966
Buku Teks
Nugent, Nicholas
In Print Publishing, 1996
Buku Teks
Kolko, Gabriel
Routledge, 1997
Buku Teks
Kolko, Gabriel.
London Routledge 1997,
Buku Teks