APA (7th ed.) Citation

Powell, J. E., & Wallis, K. (1968). The House of Lords in the Middle Ages: A history of the English House of Lords to 1540. Weidenfeld & Nicolson.

Chicago Style (17th ed.) Citation

Powell, J. Enoch, and Keith Wallis. The House of Lords in the Middle Ages: A History of the English House of Lords to 1540. London: Weidenfeld & Nicolson, 1968.

MLA (9th ed.) Citation

Powell, J. Enoch, and Keith Wallis. The House of Lords in the Middle Ages: A History of the English House of Lords to 1540. Weidenfeld & Nicolson, 1968.