Cita APA (7a ed.)

Brooks, K. B. (2009). Before Earth Day: The Origins of American Environmental Law, 1945-1970. University Press of Kansas.

Cita Chicago Style (17a ed.)

Brooks, Karl Boyd. Before Earth Day: The Origins of American Environmental Law, 1945-1970. Lawrence: University Press of Kansas, 2009.

Cita MLA (8a ed.)

Brooks, Karl Boyd. Before Earth Day: The Origins of American Environmental Law, 1945-1970. University Press of Kansas, 2009.