APA (7e ed.) Bronvermelding

Não informado. (1919). Department circular. U.S. Department of Agriculture.

Chicago (17e ed.) Bronvermelding

Não informado. Department Circular. Washington: U.S. Department of Agriculture, 1919.

MLA (8e ed.) Bronvermelding

Não informado. Department Circular. U.S. Department of Agriculture, 1919.

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