Não informado. (1939). Biological abstracts. Union of American Biological Societies.
Style de citation Chicago (17e éd.)Não informado. Biological Abstracts. Philadelphia, Pa: Union of American Biological Societies, 1939.
Style de citation MLA (8e éd.)Não informado. Biological Abstracts. Union of American Biological Societies, 1939.
Attention : ces citations peuvent ne pas être correctes à 100%.