Cita APA (7th ed.)

Francis, R. A., & Chadwick, M. A. (2013). Urban ecosystems: Understanding the human environment. Routlege.

Cita Chicago (17th ed.)

Francis, Robert A., i Michael A. Chadwick. Urban Ecosystems: Understanding the Human Environment. Abingdon, Oxon: Routlege, 2013.

Cita MLA (9th ed.)

Francis, Robert A., i Michael A. Chadwick. Urban Ecosystems: Understanding the Human Environment. Routlege, 2013.