(1982). Michael Eckle, Ludwig Arnold, Jochen Scheithauer.
Cita Chicago (17th ed.)Michael Eckle, Ludwig Arnold, Jochen Scheithauer. München, 1982.
Cita MLA (8th ed.)Michael Eckle, Ludwig Arnold, Jochen Scheithauer. 1982.
Atenció: Aquestes cites poden no estar 100% correctes.