APA (7th ed.) Citation

Marco, G. A. (2001). Opera: A research and information guide (2nd edition.). Garland Publishing, Inc.

Chicago Style (17th ed.) Citation

Marco, Guy A. Opera: A Research and Information Guide. 2nd edition. New York: Garland Publishing, Inc, 2001.

MLA (8th ed.) Citation

Marco, Guy A. Opera: A Research and Information Guide. 2nd edition. Garland Publishing, Inc, 2001.