Ullrich, W. Employability: Wolfgang Ullrich. Bologna-Bestiarium.(2013).
Cita Chicago (17th ed.)Ullrich, Wolfgang. "Employability: Wolfgang Ullrich." Bologna-Bestiarium.(2013) .
Cita MLA (8th ed.)Ullrich, Wolfgang. "Employability: Wolfgang Ullrich." Bologna-Bestiarium.(2013), .
Atenció: Aquestes cites poden no estar 100% correctes.