Howlett, M. P., & Ramesh, M. (1995). Studying public policy: Policy cycles and policy subsystems. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Howlett, Michael Patrick, agus M. Ramesh. Studying Public Policy: Policy Cycles and Policy Subsystems. Toronto: Oxford University Press, 1995.
Lua MLA (9ú heag.)Howlett, Michael Patrick, agus M. Ramesh. Studying Public Policy: Policy Cycles and Policy Subsystems. Oxford University Press, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.