Silcock, P. (1999). New Progressivism. Falmer Press.
Chicago-čujuhus (17. p.)Silcock, Peter. New Progressivism. London: Falmer Press, 1999.
MLA-čujuhus (9. p.)Silcock, Peter. New Progressivism. Falmer Press, 1999.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.