Não informado. (1974). World mineral statistics. Institute of Geological Sciences.
Style de citation Chicago (17e éd.)Não informado. World Mineral Statistics. London: Institute of Geological Sciences, 1974.
Style de citation MLA (8e éd.)Não informado. World Mineral Statistics. Institute of Geological Sciences, 1974.
Attention : ces citations peuvent ne pas être correctes à 100%.