Campbell, H. E., & Corley, E. A. (2012). Urban environmental policy analysis. M.E. Sharpe.
Lua i Stíl Chicago (17ú heag.)Campbell, Heather E., agus Elizabeth A. Corley. Urban Environmental Policy Analysis. Armonk, N.Y.: M.E. Sharpe, 2012.
Lua MLA (8ú heag.)Campbell, Heather E., agus Elizabeth A. Corley. Urban Environmental Policy Analysis. M.E. Sharpe, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.