Não informado. (1946). Extension service news. Virginia Polytechnic Institute, Agricultural Extension Service.
Style de citation Chicago (17e éd.)Não informado. Extension Service News. Blacksburg, Va: Virginia Polytechnic Institute, Agricultural Extension Service, 1946.
Style de citation MLA (8e éd.)Não informado. Extension Service News. Virginia Polytechnic Institute, Agricultural Extension Service, 1946.
Attention : ces citations peuvent ne pas être correctes à 100%.