BIRCH, A. H. (1984). The British system of government (2nd ed.). George Allen & Unwin.
Cita Chicago (17th ed.)BIRCH, Anthony H. The British System of Government. 2nd ed. London: George Allen & Unwin, 1984.
Cita MLA (9th ed.)BIRCH, Anthony H. The British System of Government. 2nd ed. George Allen & Unwin, 1984.
Atenció: Aquestes cites poden no estar 100% correctes.