Percy-Smith, J. (1996). Needs assessments in public policy. Open University Press.
Dyfyniad Arddull ChicagoPercy-Smith, Janie. Needs Assessments in Public Policy. Philadelphia: Open University Press, 1996.
Dyfyniad MLAPercy-Smith, Janie. Needs Assessments in Public Policy. Open University Press, 1996.
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