Beethoven, L. v., & Fischer, E. (1950). Sonatas: Beethoven. His Master's Voice.
Lua i Stíl Chicago (17ú heag.)Beethoven, Ludwig van, agus Edwin Fischer. Sonatas: Beethoven. Hayes, Middlesex: His Master's Voice, 1950.
Lua MLA (8ú heag.)Beethoven, Ludwig van, agus Edwin Fischer. Sonatas: Beethoven. His Master's Voice, 1950.
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