Cita APA (7th ed.)

McDonnell, M. J., & Pickett, S. T. A. (1993). Humans as components of ecosystems: The ecology of subtle human effects and populated areas. Springer.

Cita Chicago (17th ed.)

McDonnell, Mark J., i Steward T. A. Pickett. Humans as Components of Ecosystems: The Ecology of Subtle Human Effects and Populated Areas. New York, USA: Springer, 1993.

Cita MLA (9th ed.)

McDonnell, Mark J., i Steward T. A. Pickett. Humans as Components of Ecosystems: The Ecology of Subtle Human Effects and Populated Areas. Springer, 1993.