Não informado. (1948). Mineral Information Service. California Division of Mines and Geology.
Style de citation Chicago (17e éd.)Não informado. Mineral Information Service. Sacramento, Calif: California Division of Mines and Geology, 1948.
Style de citation MLA (8e éd.)Não informado. Mineral Information Service. California Division of Mines and Geology, 1948.
Attention : ces citations peuvent ne pas être correctes à 100%.