Doyle, William, author
Oxford University Press , 1989
Buku Teks
Lefebvre, Georges, author
Routledge, 2001
Buku Teks
Fukuyama, Francis, author
Farrar, Straus and Giruox, 2012
Buku Teks
Thompson, J.M., author
Basil Blackwell, 1955.
Buku Teks
Carlyle, Thomas, author
E.P. Dutton, 1955
Buku Teks