(2019). Modern Piano Improvisation: 15 easy pieces for playing & improvising / Julia Hülsmann. Advance Music.
Chicago-viite (17. p.)Modern Piano Improvisation: 15 Easy Pieces for Playing & Improvising / Julia Hülsmann. Mainz: Advance Music, 2019.
MLA-viite (8. p.)Modern Piano Improvisation: 15 Easy Pieces for Playing & Improvising / Julia Hülsmann. Advance Music, 2019.
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