Cita APA (7th ed.)

World Health Organization. (2000). Air quality guidelines for europe (2nd-ed.). World Health Organization.

Cita Chicago (17th ed.)

World Health Organization. Air Quality Guidelines for Europe. 2nd-ed. Copenhagen: World Health Organization, 2000.

Cita MLA (8th ed.)

World Health Organization. Air Quality Guidelines for Europe. 2nd-ed. World Health Organization, 2000.