Elchinger, R. (1924). Beethovens Briefe. Hirth.
Cita Chicago (17th ed.)Elchinger, Richard. Beethovens Briefe. München: Hirth, 1924.
Cita MLA (8th ed.)Elchinger, Richard. Beethovens Briefe. Hirth, 1924.
Atenció: Aquestes cites poden no estar 100% correctes.