APA (7e ed.) Bronvermelding

Não informado. (1939). Biological abstracts. Union of American Biological Societies.

Chicago (17e ed.) Bronvermelding

Não informado. Biological Abstracts. Philadelphia, Pa: Union of American Biological Societies, 1939.

MLA (8e ed.) Bronvermelding

Não informado. Biological Abstracts. Union of American Biological Societies, 1939.

Let op: Deze citaties zijn niet altijd 100% accuraat.