APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Crocker, Thomas D., and A. J. Rogers. Environmental Economics. Hinsdale, Ill: Dryden Pr, 1971.

MLA (9th ed.) Citation

Crocker, Thomas D., and A. J. Rogers. Environmental Economics. Dryden Pr, 1971.