Vogl, J. Lernen, lebenslanges: Joseph Vogl. Bologna-Bestiarium.(2013).
Cita Chicago (17th ed.)Vogl, Joseph. "Lernen, Lebenslanges: Joseph Vogl." Bologna-Bestiarium.(2013) .
Cita MLA (8th ed.)Vogl, Joseph. "Lernen, Lebenslanges: Joseph Vogl." Bologna-Bestiarium.(2013), .
Atenció: Aquestes cites poden no estar 100% correctes.