Department For Economic And Social Development Statistica Officel. (1992). Statistical Yearbook. United Nations.
Чикаго маягийн жагсаалтDepartment For Economic And Social Development Statistica Officel. Statistical Yearbook. New York: United Nations, 1992.
MLA ишлэлDepartment For Economic And Social Development Statistica Officel. Statistical Yearbook. United Nations, 1992.
Warning: These citations may not always be 100% accurate.