Cita APA (7th ed.)

COI & Central Office of Information. (1994). The british system of government (2a. ed.). HMSO.

Cita Chicago (17th ed.)

COI i Central Office of Information. The British System of Government. 2a. ed. Londres: HMSO, 1994.

Cita MLA (9th ed.)

COI i Central Office of Information. The British System of Government. 2a. ed. HMSO, 1994.