APA (7th ed.) Citation

Butterworth. (1999). Harmony in practice: Answer book. ABRSM.

Chicago Style (17th ed.) Citation

Butterworth. Harmony in Practice: Answer Book. London: ABRSM, 1999.

MLA (8th ed.) Citation

Butterworth. Harmony in Practice: Answer Book. ABRSM, 1999.

Warning: These citations may not always be 100% accurate.