World bank. (1996). : World resources, 1996-97: The urban environment. Oxford university press.
Chicago Style aipamenaWorld bank. : World Resources, 1996-97: The Urban Environment. New York: Oxford university press, 1996.
MLA aipamenaWorld bank. : World Resources, 1996-97: The Urban Environment. Oxford university press, 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.