APA
United Nations E. C. f. E., United Nations E. C. f. E., . (1987). Recommendations for the 1990 censuses of populatio. New York: UN.
Chicago
United Nations Economic Commission for Europe, United Nations Economic Commission for Europe, . 1987. Recommendations for the 1990 censuses of populatio. New York: UN.
Harvard
United Nations E. C. f. E., United Nations E. C. f. E., . (1987). Recommendations for the 1990 censuses of populatio. New York: UN.
MLA
United Nations Economic Commission for Europe, United Nations Economic Commission for Europe, . Recommendations for the 1990 censuses of populatio. New York: UN. 1987.
