APA aipamena

Vig, N. J., & Kraft, M. E. (2013). Environmental policy: New directions for the 21st century (8th ed.). CQ Press.

Chicago Style aipamena

Vig, Norman J., and Michael E. Kraft. Environmental Policy: New Directions for the 21st Century. 8th ed. Thousand Oaks,CA: CQ Press, 2013.

MLA aipamena

Vig, Norman J., and Michael E. Kraft. Environmental Policy: New Directions for the 21st Century. 8th ed. CQ Press, 2013.