Cita APA (7a ed.)

ebrary, Inc, & Helm, D. (2005). Climate-change policy. Oxford University Press.

Cita Chicago Style (17a ed.)

ebrary, Inc, y Dieter Helm. Climate-change Policy. Oxford: Oxford University Press, 2005.

Cita MLA (9a ed.)

ebrary, Inc, y Dieter Helm. Climate-change Policy. Oxford University Press, 2005.