Cita APA (7th ed.)

Pepper, D., Youngs, M., & Perkins , J. (1984). The roots of modern environmentalism with material. Routledge.

Cita Chicago (17th ed.)

Pepper, David, Martyn Youngs, i John Perkins. The Roots of Modern Environmentalism with Material. London: Routledge, 1984.

Cita MLA (9th ed.)

Pepper, David, et al. The Roots of Modern Environmentalism with Material. Routledge, 1984.