Não informado. (2001). Annual Report of the Massachusetts Extension Service. Massachusetts Extension Service.
Chicago (17e ed.) BronvermeldingNão informado. Annual Report of the Massachusetts Extension Service. Amherst, Mass: Massachusetts Extension Service, 2001.
MLA (8e ed.) BronvermeldingNão informado. Annual Report of the Massachusetts Extension Service. Massachusetts Extension Service, 2001.
Let op: Deze citaties zijn niet altijd 100% accuraat.