APA Баримт

United nations. (1991). Assessment of Long-range transboundary air pollution. UN.

Чикаго маягийн жагсаалт

United nations. Assessment of Long-range Transboundary Air Pollution. Geneva: UN, 1991.

MLA ишлэл

United nations. Assessment of Long-range Transboundary Air Pollution. UN, 1991.