Organizace spojených národů. Statistical Office. Statistical yearbook 1988/89: data available as of 1 September 1991 = Annuaire statistique 1988/89: données disponibles au 1er septembre 1991 / Department of International Economic and Social Affairs, Statistical Office. 37th ed. New York: United Nations, 1992. xii, 1130 s.
(1992). Statistical yearbook 1988/89: Data available as of 1 September 1991 = Annuaire statistique 1988/89 : données disponibles au 1er septembre 1991 / Department of International Economic and Social Affairs, Statistical Office (37th ed.). New York: United Nations.
Styl ChicagoStatistical Yearbook 1988/89: Data Available As of 1 September 1991 = Annuaire Statistique 1988/89 : Données Disponibles Au 1er Septembre 1991 / Department of International Economic and Social Affairs, Statistical Office. 37th ed. New York: United Nations, 1992.
Citace podle MLAStatistical Yearbook 1988/89: Data Available As of 1 September 1991 = Annuaire Statistique 1988/89 : Données Disponibles Au 1er Septembre 1991 / Department of International Economic and Social Affairs, Statistical Office. 37th ed. New York: United Nations, 1992.
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