Não informado. (1946). Extension service news. Virginia Polytechnic Institute, Agricultural Extension Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Extension Service News. Blacksburg, Va: Virginia Polytechnic Institute, Agricultural Extension Service, 1946.
MLA-Zitierstil (8. Ausg.)Não informado. Extension Service News. Virginia Polytechnic Institute, Agricultural Extension Service, 1946.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.