APA (7th ed.) Citation

Portney, P. R., & Stavins, R. N. Public policies for environmental protection (Second edition.).

Chicago Style (17th ed.) Citation

Portney, Paul R., and R. N. Stavins. Public Policies for Environmental Protection. Second edition.

MLA (9th ed.) Citation

Portney, Paul R., and R. N. Stavins. Public Policies for Environmental Protection. Second edition.

Warning: These citations may not always be 100% accurate.