APA-referens (7:e uppl.)

Hough, M. (2004). Cities and natural process: A basis for sustainability (2nd ed.). Routledge.

Chicago-referens (17:e uppl.)

Hough, Michael. Cities and Natural Process: A Basis for Sustainability. 2nd ed. London ; New York: Routledge, 2004.

MLA-referens (9:e uppl.)

Hough, Michael. Cities and Natural Process: A Basis for Sustainability. 2nd ed. Routledge, 2004.