Citazione Stile APA (7a Edizione)

Johnston, R. J. (1991). Environmental problems: Nature, economy and state. Belhaven Press.

Citazione stile Chigago Style (17a edizione)

Johnston, Ronald John. Environmental Problems: Nature, Economy and State. London ; New York: Belhaven Press, 1991.

Citatione MLA (9a ed.)

Johnston, Ronald John. Environmental Problems: Nature, Economy and State. Belhaven Press, 1991.