Lester, J. P., & Hedge, D. M. (2008). Public policy: An evolutionary approach (3rd ed.). Thomson/Wadsworth.
Cita Chicago (17th ed.)Lester, James P., i David M. Hedge. Public Policy: An Evolutionary Approach. 3rd ed. Belmont, CA: Thomson/Wadsworth, 2008.
Cita MLA (9th ed.)Lester, James P., i David M. Hedge. Public Policy: An Evolutionary Approach. 3rd ed. Thomson/Wadsworth, 2008.
Atenció: Aquestes cites poden no estar 100% correctes.