Cass, J. (1956). Rudiments of music: A detailed study in music essentials. Appleton-Century-Crofts.
Citace podle Chicago (17th ed.)Cass, Jeannette. Rudiments of Music: A Detailed Study in Music Essentials. New York: Appleton-Century-Crofts, 1956.
Citace podle MLA (9th ed.)Cass, Jeannette. Rudiments of Music: A Detailed Study in Music Essentials. Appleton-Century-Crofts, 1956.
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