Cita APA (7a ed.)

Palmer, A. W. (1990). The Penguin dictionary of twentieth-century history (3rd ed.). Penguin.

Cita Chicago Style (17a ed.)

Palmer, Alan Warwick. The Penguin Dictionary of Twentieth-century History. 3rd ed. Harmondsworth: Penguin, 1990.

Cita MLA (9a ed.)

Palmer, Alan Warwick. The Penguin Dictionary of Twentieth-century History. 3rd ed. Penguin, 1990.