APA (7th ed.) Citation

(2006). The 20 British prime ministers of the 20th century (1. publ.). Haus.

Chicago Style (17th ed.) Citation

The 20 British Prime Ministers of the 20th Century. 1. publ. London: Haus, 2006.

MLA (9th ed.) Citation

The 20 British Prime Ministers of the 20th Century. 1. publ. Haus, 2006.