Cita APA (7th ed.)

, N. (1991). Britain in 2010: The PSI Report (3.). PSI Publishing.

Cita Chicago (17th ed.)

, Northcott. Britain in 2010: The PSI Report. 3. London: PSI Publishing, 1991.

Cita MLA (9th ed.)

, Northcott. Britain in 2010: The PSI Report. 3. PSI Publishing, 1991.

Atenció: Aquestes cites poden no estar 100% correctes.