Cita APA (7a ed.)
Bastien, J. The Older Beginner Piano Course: Level 2. Kjos Music.
Cita estilo Chicago (17a ed.)
Bastien, James. The Older Beginner Piano Course: Level 2. San Diego, EUA: Kjos Music.
Cita MLA (9a ed.)
Bastien, James. The Older Beginner Piano Course: Level 2. Kjos Music.
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