APA (7th ed.) Citation

Porter, G., & Janet Welsh Brown. (1991). Global environmental politics. Westview Press.

Chicago Style (17th ed.) Citation

Porter, Gareh, and Janet Welsh Brown. Global Environmental Politics. Boulder, Colombia: Westview Press, 1991.

MLA (9th ed.) Citation

Porter, Gareh, and Janet Welsh Brown. Global Environmental Politics. Westview Press, 1991.