Palmer, W. A., Lethco, A. V., & Manus, M. (1997). Alfred's basic adult piano course. Alfred Pub. Co.
Lua i Stíl Chicago (17ú heag.)Palmer, Willard A., Amanda Vick Lethco, agus Morton Manus. Alfred's Basic Adult Piano Course. [Place of publication not identified]: Alfred Pub. Co, 1997.
Lua MLA (9ú heag.)Palmer, Willard A., et al. Alfred's Basic Adult Piano Course. Alfred Pub. Co, 1997.
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