Não informado. (2010). The American Geologist. Geological Publishing House.
Chicagoスタイル(17版)引用形式Não informado. The American Geologist. Minneapolis, Minn: Geological Publishing House, 2010.
MLA(8版)引用形式Não informado. The American Geologist. Geological Publishing House, 2010.
警告: この引用は必ずしも正確ではありません.