Lua APA (7ú heag.)
Cole, W. (1953). Question and exercises on theory on music: With hints on working. The ABRSM.
Lua i Stíl Chicago (17ú heag.)
Cole, William. Question and Exercises on Theory on Music: With Hints on Working. The ABRSM, 1953.
Lua MLA (9ú heag.)
Cole, William. Question and Exercises on Theory on Music: With Hints on Working. The ABRSM, 1953.
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