APA (7th ed.) Citation

Palmer, A. W. (1983). The Penguin dictionary of twentieth-century history (2nd ed.). Penguin Books.

Chicago Style (17th ed.) Citation

Palmer, Alan Warwick. The Penguin Dictionary of Twentieth-century History. 2nd ed. Harmondsworth [etc.]: Penguin Books, 1983.

MLA (9th ed.) Citation

Palmer, Alan Warwick. The Penguin Dictionary of Twentieth-century History. 2nd ed. Penguin Books, 1983.