Não informado. (2001). Annual Report of the Massachusetts Extension Service. Massachusetts Extension Service.
Chicago-Zitierstil (17. Ausg.)Não informado. Annual Report of the Massachusetts Extension Service. Amherst, Mass: Massachusetts Extension Service, 2001.
MLA-Zitierstil (8. Ausg.)Não informado. Annual Report of the Massachusetts Extension Service. Massachusetts Extension Service, 2001.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.