Lester, J. P., & Stewart, J. (2000). Public policy: An evolutionary approach (2nd ed.). Wadsworth/Thomson Learning.
Lua i Stíl Chicago (17ú heag.)Lester, James P., agus Joseph Stewart. Public Policy: An Evolutionary Approach. 2nd ed. Australia: Wadsworth/Thomson Learning, 2000.
Lua MLA (9ú heag.)Lester, James P., agus Joseph Stewart. Public Policy: An Evolutionary Approach. 2nd ed. Wadsworth/Thomson Learning, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.