APA (7th ed.) Zitazioa
United Nations Human Settlements programme. (2006). The challenge of slums: Global report on human settlements 2003. Earthscan.
Chicago Style (17th ed.) Zitazioa
United Nations Human Settlements programme. The Challenge of Slums: Global Report on Human Settlements 2003. London: Earthscan, 2006.
MLA (9th ed.) Zitazioa
United Nations Human Settlements programme. The Challenge of Slums: Global Report on Human Settlements 2003. Earthscan, 2006.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.