APA (7th ed.) Citation

Mackenzie, K. R. (1951). The English Parliament. Penguin Books.

Chicago Style (17th ed.) Citation

Mackenzie, Kenneth R. The English Parliament. Harmondsworth, Middlesex: Penguin Books, 1951.

MLA (9th ed.) Citation

Mackenzie, Kenneth R. The English Parliament. Penguin Books, 1951.