Schmidt, A. (1986). Zettel's Traum. Fischer.
Cita Chicago (17th ed.)Schmidt, Arno. Zettel's Traum. Frankfurt a.M.: Fischer, 1986.
Cita MLA (8th ed.)Schmidt, Arno. Zettel's Traum. Fischer, 1986.
Atenció: Aquestes cites poden no estar 100% correctes.