Clark, A. N. (2003). The Penguin dictionary of geography (3rd ed.). London, England ; New York, N.Y., USA: Penguin Books.
Dyfyniad Arddull ChicagoClark, Audrey N. The Penguin Dictionary of Geography. 3rd ed. London, England ; New York, N.Y., USA: Penguin Books, 2003.
Dyfyniad MLAClark, Audrey N. The Penguin Dictionary of Geography. 3rd ed. London, England ; New York, N.Y., USA: Penguin Books, 2003.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.