APA (7th ed.) Citation

Allen. (2003). The PENGUIN English dictionary. London Penguin 2003.

Chicago Style (17th ed.) Citation

Allen. The PENGUIN English Dictionary. London: London Penguin 2003, 2003.

MLA (8th ed.) Citation

Allen. The PENGUIN English Dictionary. London Penguin 2003, 2003.

Warning: These citations may not always be 100% accurate.