Não informado. (2000). United Kingdom mineral statistics. British Geological Survey.
Style de citation Chicago (17e éd.)Não informado. United Kingdom Mineral Statistics. London: British Geological Survey, 2000.
Style de citation MLA (8e éd.)Não informado. United Kingdom Mineral Statistics. British Geological Survey, 2000.
Attention : ces citations peuvent ne pas être correctes à 100%.