APA (7th ed.) Citation

Taylor, E. R. (1993). The AB guide to music theory (Revised 1993.). Associated Board of the Royal Schools of Music.

Chicago Style (17th ed.) Citation

Taylor, Eric Robert. The AB Guide to Music Theory. Revised 1993. London: Associated Board of the Royal Schools of Music, 1993.

MLA (9th ed.) Citation

Taylor, Eric Robert. The AB Guide to Music Theory. Revised 1993. Associated Board of the Royal Schools of Music, 1993.