APA (7th ed.) Citation

Purcell, H., & Howarth, E. (1980). Trumpet tune and air. Chester Music.

Chicago Style (17th ed.) Citation

Purcell, Henry, and Elgar Howarth. Trumpet Tune and Air. London: Chester Music, 1980.

MLA (9th ed.) Citation

Purcell, Henry, and Elgar Howarth. Trumpet Tune and Air. Chester Music, 1980.