APA (7th ed.) Citation

Palmer, A. W. (1964). A dictionary of modern history, 1789-1945. Penguin Books.

Chicago Style (17th ed.) Citation

Palmer, Alan Warwick. A Dictionary of Modern History, 1789-1945. Baltimore: Penguin Books, 1964.

MLA (9th ed.) Citation

Palmer, Alan Warwick. A Dictionary of Modern History, 1789-1945. Penguin Books, 1964.