Citazione Stile APA (7a Edizione)
Vig, N. J., & Kraft, M. E. (2013). Environmental policy: New directions for the twenty-first century (8th ed.). CQ Press.
Citazione stile Chigago Style (17a edizione)
Vig, Norman J., e Michael E. Kraft. Environmental Policy: New Directions for the Twenty-first Century. 8th ed. Thousand Oaks: CQ Press, 2013.
Citatione MLA (9a ed.)
Vig, Norman J., e Michael E. Kraft. Environmental Policy: New Directions for the Twenty-first Century. 8th ed. CQ Press, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.