Cramer, J. B. (1939). Eighty-four studies for the piano. G. Schirmer.
Chicago-čujuhus (17. p.)Cramer, Johann Baptist. Eighty-four Studies for the Piano. New York: G. Schirmer, 1939.
MLA-čujuhus (9. p.)Cramer, Johann Baptist. Eighty-four Studies for the Piano. G. Schirmer, 1939.
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