APA (7e ed.) Bronvermelding

Não informado. (1943). Bibliographical bulletin. U.S. Department of Agriculture.

Chicago (17e ed.) Bronvermelding

Não informado. Bibliographical Bulletin. Washington: U.S. Department of Agriculture, 1943.

MLA (8e ed.) Bronvermelding

Não informado. Bibliographical Bulletin. U.S. Department of Agriculture, 1943.

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