APA (7th ed.) Citation

Mills, G., Reed, L., & Kerr, A. (1969). It's not unusual: For mixed chorus (SATB) with piano and optional percussion and string bass. Leeds Music Limited.

Chicago Style (17th ed.) Citation

Mills, Gordon, Les Reed, and Anita Kerr. It's Not Unusual: For Mixed Chorus (SATB) with Piano and Optional Percussion and String Bass. London: Leeds Music Limited, 1969.

MLA (9th ed.) Citation

Mills, Gordon, et al. It's Not Unusual: For Mixed Chorus (SATB) with Piano and Optional Percussion and String Bass. Leeds Music Limited, 1969.