Cita APA

Owens, S., & Owens, P. L. (1991). Environment, resources and conservation. New York: Cambridge University.

Citación estilo Chicago

Owens, Susan, y P. L. Owens. Environment, Resources and Conservation. New York: Cambridge University, 1991.

Cita MLA

Owens, Susan, y P. L. Owens. Environment, Resources and Conservation. New York: Cambridge University, 1991.