Original tekst: Piano Etudes Level 9. Keith Snell. Piano Method sheet music. Piano Solo sheet music. Piano Etudes Level 9 composed by Keith Snell. Level 9.
Oversættelse: Piano Etudes niveau 9. Udvalgte komponister omfatter Czerny, Beyer, Berens, Kunz, Kuhler, Gurlitt, Streabbog, og mange andre.