APA (7e ed.) Bronvermelding

Northrop, R. B., & Connor, A. N. (2013). Ecological sustainability: Understanding complex issues. CRC Press/Taylor & Francis Group.

Chicago (17e ed.) Bronvermelding

Northrop, Robert B., en Anne N. Connor. Ecological Sustainability: Understanding Complex Issues. Boca Raton, Fl: CRC Press/Taylor & Francis Group, 2013.

MLA (9e ed.) Bronvermelding

Northrop, Robert B., en Anne N. Connor. Ecological Sustainability: Understanding Complex Issues. CRC Press/Taylor & Francis Group, 2013.