(1999). Die OB-Stichwahl am 26. September 1999 in Düsseldorf.
Cita Chicago (17th ed.)Die OB-Stichwahl Am 26. September 1999 in Düsseldorf. Düsseldorf, 1999.
Cita MLA (8th ed.)Die OB-Stichwahl Am 26. September 1999 in Düsseldorf. 1999.
Atenció: Aquestes cites poden no estar 100% correctes.