APA (7th ed.) Citation

O'Riordan, T. (1981). Environmentalism (2nd rev. ed.). Pion.

Chicago Style (17th ed.) Citation

O'Riordan, Timothy. Environmentalism. 2nd rev. ed. London: Pion, 1981.

MLA (9th ed.) Citation

O'Riordan, Timothy. Environmentalism. 2nd rev. ed. Pion, 1981.