APA
United Nations: Economic Commission for Europe, .Economic Survey of Europe in 1986 -1987. New York: .
Chicago
United Nations: Economic Commission for Europe, .Economic Survey of Europe in 1986 -1987. New York: .
Harvard
United Nations: Economic Commission for Europe, .Economic Survey of Europe in 1986 -1987. New York: .
MLA
United Nations: Economic Commission for Europe, .New York: . .