Joy Hakim
Freedom A History of US
Oxford University Press, 2003
Buku Teks
Bury, J.B.
A history of freedom of thought
Oxford University Press, 1913
Buku Teks
Bury, J.B.
A history of freedom of thught
Oxforkd Univ.Press, 1952
Buku Teks
Ritchie, Donald A.
Heritage of freedom history of the United States
Macmillan, 1985
Buku Teks
Piggott, Stuart
Wagon, Chariot and carriage : symbol and status in the history of transport / Stuart Piggott
Thames and Hudson, 1992
Buku Teks