APA (7th ed.) Citation

Renzi, F., Rorem, N., Perle, G., & Persichetti, V. (1997). 20th century etudes. Centaur.

Chicago Style (17th ed.) Citation

Renzi, Frances, Ned Rorem, George Perle, and Vincent Persichetti. 20th Century Etudes. Baton Rouge, LA: Centaur, 1997.

MLA (9th ed.) Citation

Renzi, Frances, et al. 20th Century Etudes. Centaur, 1997.