APA (7th ed.) Citation

Palmer A. W. (1962). A Dictionary of modern history: (1789-1945). Penguin.

Chicago Style (17th ed.) Citation

Palmer A. W. A Dictionary of Modern History: (1789-1945). Middlesex, England,: Penguin, 1962.

MLA (9th ed.) Citation

Palmer A. W. A Dictionary of Modern History: (1789-1945). Penguin, 1962.