Não informado. (1946). Extension service news. Virginia Polytechnic Institute, Agricultural Extension Service.
Citação do estilo Chicago (17ª ed.)Não informado. Extension Service News. Blacksburg, Va: Virginia Polytechnic Institute, Agricultural Extension Service, 1946.
Citação MLA (8ª ed.)Não informado. Extension Service News. Virginia Polytechnic Institute, Agricultural Extension Service, 1946.
警告：这些引文格式不一定是100％准确.