Não informado. (1954). Gems and minerals. California Federation of Mineralogical Societies and Other Mineralogical.
Chicago-Zitierstil (17. Ausg.)Não informado. Gems and Minerals. Mentone, Calif: California Federation of Mineralogical Societies and Other Mineralogical, 1954.
MLA-Zitierstil (8. Ausg.)Não informado. Gems and Minerals. California Federation of Mineralogical Societies and Other Mineralogical, 1954.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.