APA (7e ed.) Bronvermelding

Não informado. (1954). Gems and minerals. California Federation of Mineralogical Societies and Other Mineralogical.

Chicago (17e ed.) Bronvermelding

Não informado. Gems and Minerals. Mentone, Calif: California Federation of Mineralogical Societies and Other Mineralogical, 1954.

MLA (8e ed.) Bronvermelding

Não informado. Gems and Minerals. California Federation of Mineralogical Societies and Other Mineralogical, 1954.

Let op: Deze citaties zijn niet altijd 100% accuraat.