Citazione Stile APA (7a Edizione)

Enger, E., & Smith, B. (1995). Pollution and policy. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Enger, Eldon, e Bradley Smith. Pollution and Policy. Boston: McGraw-Hill, 1995.

Citatione MLA (9a ed.)

Enger, Eldon, e Bradley Smith. Pollution and Policy. McGraw-Hill, 1995.