APA (7th ed.) Citation

Birch, A. H. (1993). The British system of government (9th ed.). Routledge.

Chicago Style (17th ed.) Citation

Birch, Anthony Harold. The British System of Government. 9th ed. London [etc.]: Routledge, 1993.

MLA (9th ed.) Citation

Birch, Anthony Harold. The British System of Government. 9th ed. Routledge, 1993.