Gary, C. L. (1967). The study of music in elementary school: A conceptual approach. DNEA.
Lua i Stíl Chicago (17ú heag.)Gary, Charles L. The Study of Music in Elementary School: A Conceptual Approach. Washington: DNEA, 1967.
Lua MLA (9ú heag.)Gary, Charles L. The Study of Music in Elementary School: A Conceptual Approach. DNEA, 1967.
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