Não informado. (1953). Geological abstracts. American Geological Institute.
Chicagoスタイル(17版)引用形式Não informado. Geological Abstracts. New York: American Geological Institute, 1953.
MLA(8版)引用形式Não informado. Geological Abstracts. American Geological Institute, 1953.
警告: この引用は必ずしも正確ではありません.