Hülsmann, J. (2019). Modern Piano Improvisation. Advance Music.
Lua i Stíl Chicago (17ú heag.)Hülsmann, Julia. Modern Piano Improvisation. Mainz: Advance Music, 2019.
Lua MLA (8ú heag.)Hülsmann, Julia. Modern Piano Improvisation. Advance Music, 2019.
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