Cita APA (7a ed.)
1987 Statistical Yearbook Annuaire statistique. United Nations.
Cita Chicago Style (17a ed.)
1987 Statistical Yearbook Annuaire Statistique. New York: United Nations.
Cita MLA (9a ed.)
1987 Statistical Yearbook Annuaire Statistique. United Nations.
Precaución: Estas citas no son 100% exactas.