Buckley, R. (1991). Perspectives in environmental management. Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)Buckley, Ralf. Perspectives in Environmental Management. Berlin: Springer-Verlag, 1991.
Lua MLA (9ú heag.)Buckley, Ralf. Perspectives in Environmental Management. Springer-Verlag, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.