Cita APA (7th ed.)

Pepper, D. (1984). The roots of modern environmentalism. Routledge.

Cita Chicago (17th ed.)

Pepper, David. The Roots of Modern Environmentalism. London: Routledge, 1984.

Cita MLA (9th ed.)

Pepper, David. The Roots of Modern Environmentalism. Routledge, 1984.