Cita APA (7th ed.)

Crocker, T. D., & Rogers, A. J. 1. (1971). Environmental economics. Dryden Press.

Cita Chicago (17th ed.)

Crocker, Thomas D., i Augustus James 1929 Rogers. Environmental Economics. Hinsdale, Ill: Dryden Press, 1971.

Cita MLA (9th ed.)

Crocker, Thomas D., i Augustus James 1929 Rogers. Environmental Economics. Dryden Press, 1971.