APA (7th ed.) Citation

Mozart, W. A., & Gruber, P. (1991). The Metropolitan Opera book of Mozart operas. HarperCollins.

Chicago Style (17th ed.) Citation

Mozart, Wolfgang Amadeus, and Paul Gruber. The Metropolitan Opera Book of Mozart Operas. New York, N.Y.: HarperCollins, 1991.

MLA (9th ed.) Citation

Mozart, Wolfgang Amadeus, and Paul Gruber. The Metropolitan Opera Book of Mozart Operas. HarperCollins, 1991.

Warning: These citations may not always be 100% accurate.