APA (7th ed.) Citation

Barber, S. (1949). Medea, op. 23. G. Schirmer.

Chicago Style (17th ed.) Citation

Barber, Samuel. Medea, Op. 23. New York: G. Schirmer, 1949.

MLA (9th ed.) Citation

Barber, Samuel. Medea, Op. 23. G. Schirmer, 1949.