HOFFER, C. R. (1985). The understanding of music.-- 5th ed. Wadsworth Publishing.
Lua i Stíl Chicago (17ú heag.)HOFFER, Charles R. The Understanding of Music.-- 5th Ed. Belmont: Wadsworth Publishing, 1985.
Lua MLA (9ú heag.)HOFFER, Charles R. The Understanding of Music.-- 5th Ed. Wadsworth Publishing, 1985.
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