APA (7e ed.) Bronvermelding

Não informado. (1941). Crop Production. Department of Agriculture, Statistical Reporting Service.

Chicago (17e ed.) Bronvermelding

Não informado. Crop Production. Washington: Department of Agriculture, Statistical Reporting Service, 1941.

MLA (8e ed.) Bronvermelding

Não informado. Crop Production. Department of Agriculture, Statistical Reporting Service, 1941.

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