Colwell, R. (1969). The teaching of instrumental music. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Colwell, Richard. The Teaching of Instrumental Music. Englewood Cliffs, N.J: Prentice-Hall, 1969.
Lua MLA (9ú heag.)Colwell, Richard. The Teaching of Instrumental Music. Prentice-Hall, 1969.
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