Citazione Stile APA (7a Edizione)

Berck, P., & Helfand, G. E. (2011). The economics of the environment. PHI Learning.

Citazione stile Chigago Style (17a edizione)

Berck, Peter, e Gloria E. Helfand. The Economics of the Environment. New Delhi: PHI Learning, 2011.

Citatione MLA (9a ed.)

Berck, Peter, e Gloria E. Helfand. The Economics of the Environment. PHI Learning, 2011.