Gordon, E. E. (1987). The nature, description, measurement, and evaluation of music aptitudes. G.I.A. Pub.
Lua i Stíl Chicago (17ú heag.)Gordon, Edwin E. The Nature, Description, Measurement, and Evaluation of Music Aptitudes. Chicago: G.I.A. Pub, 1987.
Lua MLA (9ú heag.)Gordon, Edwin E. The Nature, Description, Measurement, and Evaluation of Music Aptitudes. G.I.A. Pub, 1987.
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