Não informado. (1954). Gems and minerals. California Federation of Mineralogical Societies and Other Mineralogical.
Cita Chicago Style (17a ed.)Não informado. Gems and Minerals. Mentone, Calif: California Federation of Mineralogical Societies and Other Mineralogical, 1954.
Cita MLA (8a ed.)Não informado. Gems and Minerals. California Federation of Mineralogical Societies and Other Mineralogical, 1954.
Precaución: Estas citas no son 100% exactas.