APA (7th ed.) Citation

Verdi, G., Shakespeare, W., Piave, F. M., Maffei, A., & Ducloux, W. (1961). Macbeth: Opera in four acts. G. Schirmer.

Chicago Style (17th ed.) Citation

Verdi, Giuseppe, William Shakespeare, Francesco Maria Piave, Andrea Maffei, and Walter Ducloux. Macbeth: Opera in Four Acts. New York: G. Schirmer, 1961.

MLA (9th ed.) Citation

Verdi, Giuseppe, et al. Macbeth: Opera in Four Acts. G. Schirmer, 1961.