Taylor, E. R., & Aston, P. (2008). Music theory in practice: Revised edition 2008. Associated Board of the Royal Schools of Music.

Taylor, Eric Robert, and Peter Aston. Music Theory in Practice: Revised Edition 2008. London: Associated Board of the Royal Schools of Music, 2008.

Taylor, Eric Robert, and Peter Aston. Music Theory in Practice: Revised Edition 2008. Associated Board of the Royal Schools of Music, 2008.