Não informado. (2007). Policy evaluation. Policy Studies Organization.
Chicago (17e ed.) BronvermeldingNão informado. Policy Evaluation. Urbana, Ill: Policy Studies Organization, 2007.
MLA (8e ed.) BronvermeldingNão informado. Policy Evaluation. Policy Studies Organization, 2007.
Let op: Deze citaties zijn niet altijd 100% accuraat.