Pepper, D. (1997). Modern environmentalism: An introduction. Routledge.
Citación estilo ChicagoPepper, David. Modern Environmentalism: An Introduction. --New York: Routledge, 1997.
Cita MLAPepper, David. Modern Environmentalism: An Introduction. Routledge, 1997.
Warning: These citations may not always be 100% accurate.