APA (7e ed.) Bronvermelding

Não informado. (1949). Abstracts of recent published material on soil and water conservation. Agricultural Research Service, Soil and Water Conservation Division.

Chicago (17e ed.) Bronvermelding

Não informado. Abstracts of Recent Published Material on Soil and Water Conservation. Washington: Agricultural Research Service, Soil and Water Conservation Division, 1949.

MLA (8e ed.) Bronvermelding

Não informado. Abstracts of Recent Published Material on Soil and Water Conservation. Agricultural Research Service, Soil and Water Conservation Division, 1949.

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