APA (7th ed.) Citation

Whittow, J. B. (1984). Penguin dictionary of physical geography. Penguin Books.

Chicago Style (17th ed.) Citation

Whittow, J. B. Penguin Dictionary of Physical Geography. London: Penguin Books, 1984.

MLA (9th ed.) Citation

Whittow, J. B. Penguin Dictionary of Physical Geography. Penguin Books, 1984.