APA (7th ed.) Citation

Cage, J., Pierce, J., & Clayton, J. (1991). Works for piano & prepared piano. Wergo-Schallpl.

Chicago Style (17th ed.) Citation

Cage, John, Joshua Pierce, and Jay Clayton. Works for Piano & Prepared Piano. Mainz: Wergo-Schallpl, 1991.

MLA (9th ed.) Citation

Cage, John, et al. Works for Piano & Prepared Piano. Wergo-Schallpl, 1991.