Gordon, E. E. (1986). Designing objective research in music education: Fundamental considerations. G.I.A. Pub.
Lua i Stíl Chicago (17ú heag.)Gordon, Edwin E. Designing Objective Research in Music Education: Fundamental Considerations. Chicago: G.I.A. Pub, 1986.
Lua MLA (9ú heag.)Gordon, Edwin E. Designing Objective Research in Music Education: Fundamental Considerations. G.I.A. Pub, 1986.
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