Metzel, O. Berlin in der Tasche. Olaf Metzel : Noproblem.
Cita Chicago (17th ed.)Metzel, Olaf. "Berlin in Der Tasche." Olaf Metzel : Noproblem .
Cita MLA (8th ed.)Metzel, Olaf. "Berlin in Der Tasche." Olaf Metzel : Noproblem, .
Atenció: Aquestes cites poden no estar 100% correctes.