Huhn, K. (1998). Blick zurück. Spotless.
Cita Chicago (17th ed.)Huhn, Klaus. Blick Zurück. Berlin: Spotless, 1998.
Cita MLA (8th ed.)Huhn, Klaus. Blick Zurück. Spotless, 1998.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)