Cita APA (7a ed.)

Harmond, R. P., & Cevasco, G. A. (2009). Modern American Environmentalists: A Biographical Encyclopedia. Johns Hopkins University Press.

Cita Chicago Style (17a ed.)

Harmond, Richard P., y G. A. Cevasco. Modern American Environmentalists: A Biographical Encyclopedia. Baltimore, MD: Johns Hopkins University Press, 2009.

Cita MLA (8a ed.)

Harmond, Richard P., y G. A. Cevasco. Modern American Environmentalists: A Biographical Encyclopedia. Johns Hopkins University Press, 2009.