Não informado. (1920). Mineralogical Abstracts. Mineralogical Society of Great Britain.
Chicagoスタイル(17版)引用形式Não informado. Mineralogical Abstracts. London: Mineralogical Society of Great Britain, 1920.
MLA(8版)引用形式Não informado. Mineralogical Abstracts. Mineralogical Society of Great Britain, 1920.
警告: この引用は必ずしも正確ではありません.