(1999). United Nations secretaries general: A bibliography with indexes / P.J. Kelly.
Cita Chicago (17th ed.)United Nations Secretaries General: A Bibliography with Indexes / P.J. Kelly. 1999.
Cita MLA (9th ed.)United Nations Secretaries General: A Bibliography with Indexes / P.J. Kelly. 1999.
Atenció: Aquestes cites poden no estar 100% correctes.