Cita APA (7a ed.)

Norton, B. G. (1991). Toward unity among environmentalists. Oxford University Press.

Cita Chicago Style (17a ed.)

Norton, Bryan G. Toward Unity Among Environmentalists. New York ; Oxford: Oxford University Press, 1991.

Cita MLA (8a ed.)

Norton, Bryan G. Toward Unity Among Environmentalists. Oxford University Press, 1991.