APA

Palmer A. W., . (1988). The Penguin dictionary of twentieth-century history. London: Penguin Books.

Chicago

Palmer Alan Warwick, . 1988. The Penguin dictionary of twentieth-century history. London: Penguin Books.

Harvard

Palmer A. W., . (1988). The Penguin dictionary of twentieth-century history. London: Penguin Books.

MLA

Palmer Alan Warwick, . The Penguin dictionary of twentieth-century history. London: Penguin Books. 1988.