“The Years of Mastery.” Beethoven's Piano Sonatas: A Short Companion, by Charles Rosen, Yale University Press, New Haven; London, 2002, pp. 164–207, www.jstor.org/stable/j.ctt5vm67n.12. Accessed 28 July 2021.
Rosen, C. (2002). The Years of Mastery. In Beethoven's Piano Sonatas: A Short Companion (pp. 164-207). New Haven; London: Yale University Press. Retrieved July 28, 2021, from http://www.jstor.org/stable/j.ctt5vm67n.12
Rosen, Charles. "The Years of Mastery." In Beethoven's Piano Sonatas: A Short Companion, 164-207. New Haven; London: Yale University Press, 2002. Accessed July 28, 2021. http://www.jstor.org/stable/j.ctt5vm67n.12.
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