, N. (1991). Britain in 2010: The PSI Report (3.). PSI Publishing.
Chicago-čujuhus (17. p.), Northcott. Britain in 2010: The PSI Report. 3. London: PSI Publishing, 1991.
MLA-čujuhus (9. p.), Northcott. Britain in 2010: The PSI Report. 3. PSI Publishing, 1991.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.