Möckel, B. (2013). Claudia Zweifel: A Friendly Deception.
Cita Chicago (17th ed.)Möckel, Birgit. Claudia Zweifel: A Friendly Deception. Berlin, 2013.
Cita MLA (8th ed.)Möckel, Birgit. Claudia Zweifel: A Friendly Deception. 2013.
Atenció: Aquestes cites poden no estar 100% correctes.