(1989). Ursula Jobst, Johannes Burkhardt, Günter Rackwitz.
Cita Chicago (17th ed.)Ursula Jobst, Johannes Burkhardt, Günter Rackwitz. Altenburg, 1989.
Cita MLA (8th ed.)Ursula Jobst, Johannes Burkhardt, Günter Rackwitz. 1989.
Atenció: Aquestes cites poden no estar 100% correctes.