Cita APA (7th ed.)
DEPARTMENT OF INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS. (1991). CONCISE REPORT ON THE WORLD POPULATION SITUATION IN 1991 WITH A SPECIAL EMPHASIS ON AGE STRUCTURE. ONU.
Cita Chicago (17th ed.)
DEPARTMENT OF INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS. CONCISE REPORT ON THE WORLD POPULATION SITUATION IN 1991 WITH A SPECIAL EMPHASIS ON AGE STRUCTURE. NUEVA YORK: ONU, 1991.
Cita MLA (9th ed.)
DEPARTMENT OF INTERNATIONAL ECONOMIC AND SOCIAL AFFAIRS. CONCISE REPORT ON THE WORLD POPULATION SITUATION IN 1991 WITH A SPECIAL EMPHASIS ON AGE STRUCTURE. ONU, 1991.
Atenció: Aquestes cites poden no estar 100% correctes.