APA (7th ed.) Citation

(1990). The state of transboundary air pollution: Report prepared within the framwork of the Convention on Long-range Transboundary Air Pollution (1989 update.). United Nations.

Chicago Style (17th ed.) Citation

The State of Transboundary Air Pollution: Report Prepared Within the Framwork of the Convention on Long-range Transboundary Air Pollution. 1989 update. New York: United Nations, 1990.

MLA (9th ed.) Citation

The State of Transboundary Air Pollution: Report Prepared Within the Framwork of the Convention on Long-range Transboundary Air Pollution. 1989 update. United Nations, 1990.