Cita APA (7th ed.)
ADVISORY COMMITTEE FOR THE CO-ORDINATION OF INFORMATION SYSTEMS. (1990). DIRECTORY OF UNITED NATIONS DATABASES AND INFORMATION SERVICES, 4TH ED. ONU.
Cita Chicago (17th ed.)
ADVISORY COMMITTEE FOR THE CO-ORDINATION OF INFORMATION SYSTEMS. DIRECTORY OF UNITED NATIONS DATABASES AND INFORMATION SERVICES, 4TH ED. NUEVA YORK: ONU, 1990.
Cita MLA (9th ed.)
ADVISORY COMMITTEE FOR THE CO-ORDINATION OF INFORMATION SYSTEMS. DIRECTORY OF UNITED NATIONS DATABASES AND INFORMATION SERVICES, 4TH ED. ONU, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.