Beethoven, L. v., & Unger, M. (1987). Symphony No. 9: For 4 solo voices, chorus and orchestra ; d minor ; op. 125 / ed. by Max Unger. Eulenburg.

Beethoven, Ludwig van, and Max Unger. Symphony No. 9: For 4 Solo Voices, Chorus and Orchestra ; D Minor ; Op. 125 / Ed. by Max Unger. London [u.a.]: Eulenburg, 1987.

Beethoven, Ludwig van, and Max Unger. Symphony No. 9: For 4 Solo Voices, Chorus and Orchestra ; D Minor ; Op. 125 / Ed. by Max Unger. Eulenburg, 1987.