Schick, U. (2007). Werner Haypeter.
Cita Chicago (17th ed.)Schick, Ulrike. Werner Haypeter. Otterndorf, 2007.
Cita MLA (8th ed.)Schick, Ulrike. Werner Haypeter. 2007.
Atenció: Aquestes cites poden no estar 100% correctes.
Cita APA (7th ed.)