APA (7th ed.) Citation

DiGaetani, J. L. (1986). An invitation to the opera. Doubleday.

Chicago Style (17th ed.) Citation

DiGaetani, John Louis. An Invitation to the Opera. New York: Doubleday, 1986.

MLA (9th ed.) Citation

DiGaetani, John Louis. An Invitation to the Opera. Doubleday, 1986.