Não informado. (1939). Biological abstracts. Union of American Biological Societies.
Chicagoスタイル(17版)引用形式Não informado. Biological Abstracts. Philadelphia, Pa: Union of American Biological Societies, 1939.
MLA(8版)引用形式Não informado. Biological Abstracts. Union of American Biological Societies, 1939.
警告: この引用は必ずしも正確ではありません.