Citazione Stile APA (7a Edizione)

De Steiguer, J. E. (1997). Age of environmentalism. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

De Steiguer, Joseph Edward. Age of Environmentalism. New York: McGraw-Hill, 1997.

Citatione MLA (9a ed.)

De Steiguer, Joseph Edward. Age of Environmentalism. McGraw-Hill, 1997.