APA Баримт

United Nations. (1993). The State of Transboundary Air Pollution 1992 Update: Air Pollution Studies 9. UN.

Чикаго маягийн жагсаалт

United Nations. The State of Transboundary Air Pollution 1992 Update: Air Pollution Studies 9. New York: UN, 1993.

MLA ишлэл

United Nations. The State of Transboundary Air Pollution 1992 Update: Air Pollution Studies 9. UN, 1993.

Warning: These citations may not always be 100% accurate.