Não informado. (1948). Mineral Information Service. California Division of Mines and Geology.
Cita Chicago Style (17a ed.)Não informado. Mineral Information Service. Sacramento, Calif: California Division of Mines and Geology, 1948.
Cita MLA (8a ed.)Não informado. Mineral Information Service. California Division of Mines and Geology, 1948.
Precaución: Estas citas no son 100% exactas.