(ajouter des références à obtenir, lorsque difficile de les ajouter directement, ou autre raison)
Shafritz (ed.) The International Encyclopedia of Public Policy and Administration (http://www.amazon.com/gp/offer-listing/0813399742/ref=tmm_hrd_used_olp_0?ie=UTF8&qid=1279568605&sr=8-3&condition=used)
Drucker, Peter. 1995. Managing in a time of great change. Excellent treatment of the concept of model.
