Hennessy, P. (2001). The prime minister: The office and its holders since 1945 (Publ. with new material.). Penguin Books.
Chicago-Zitierstil (17. Ausg.)Hennessy, Peter. The Prime Minister: The Office and Its Holders Since 1945. Publ. with new material. London: Penguin Books, 2001.
MLA-Zitierstil (9. Ausg.)Hennessy, Peter. The Prime Minister: The Office and Its Holders Since 1945. Publ. with new material. Penguin Books, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.