Dyfyniad APA
World Health Organization. Regional Office for Europe, ebrary, Inc, & Amann, M. (2008). Health risks of ozone from long-range transboundary air pollution. World Health Organization, Regional Office for Europe.
Dyfyniad Arddull Chicago
World Health Organization. Regional Office for Europe, Inc ebrary, and Madrkus Amann. Health Risks of Ozone from Long-range Transboundary Air Pollution. Copenhagen: World Health Organization, Regional Office for Europe, 2008.
Dyfyniad MLA
World Health Organization. Regional Office for Europe, et al. Health Risks of Ozone from Long-range Transboundary Air Pollution. World Health Organization, Regional Office for Europe, 2008.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.