Cita APA

ONU, & Banco Mundial. (2003). World resources, 2002-2004 (First printing.). Washington, D. C.: World resources Institute.

Citación estilo Chicago

ONU, y Banco Mundial. World Resources, 2002-2004. First printing. Washington, D. C.: World resources Institute, 2003.

Cita MLA

ONU, y Banco Mundial. World Resources, 2002-2004. First printing. Washington, D. C.: World resources Institute, 2003.