Pischna, J., & Wolff, B. (1908). The little Pischna forty-eight practice pieces for the piano: Introduction to Pischna's sixty progressive exercises. Schirmer.
Citace podle Chicago (17th ed.)Pischna, Josef, a Bernhard Wolff. The Little Pischna Forty-eight Practice Pieces for the Piano: Introduction to Pischna's Sixty Progressive Exercises. New York: Schirmer, 1908.
Citace podle MLA (9th ed.)Pischna, Josef, a Bernhard Wolff. The Little Pischna Forty-eight Practice Pieces for the Piano: Introduction to Pischna's Sixty Progressive Exercises. Schirmer, 1908.
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