Hülsmann, J. (2019). Modern Piano Improvisation. Advance Music.
Čikaški stil citiranja (17. izdanje)Hülsmann, Julia. Modern Piano Improvisation. Mainz: Advance Music, 2019.
MLA način citiranja (8. izdanje)Hülsmann, Julia. Modern Piano Improvisation. Advance Music, 2019.
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