Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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