APA (7th ed.) Citation

Greenberg, R. (2001). How to listen to and understand opera. Teaching Co..

Chicago Style (17th ed.) Citation

Greenberg, Robert. How to Listen to and Understand Opera. Chantilly, VA: Teaching Co., 2001.

MLA (9th ed.) Citation

Greenberg, Robert. How to Listen to and Understand Opera. Teaching Co., 2001.