Franklin D. Roosevelt (2008). “Fireside chats of Franklin Delano Roosevelt: radio addresses to the American people about the Depression, the New Deal, and the Second World War, 1933-1944”, Red & Black Pub
Robert Owen (1841). “A development of the principles and plans on which to establish self-supporting home colonies: as a most secure and profitable investment for capital, and an effectual means permanently to remove the causes of ignorance, poverty, and crime”, p.7