APA (7th ed.) Citation

Henderson, W. J. (1971). Some forerunners of Italian opera. Books for Libraries Press.

Chicago Style (17th ed.) Citation

Henderson, W. J. Some Forerunners of Italian Opera. Freeport, N.Y.: Books for Libraries Press, 1971.

MLA (9th ed.) Citation

Henderson, W. J. Some Forerunners of Italian Opera. Books for Libraries Press, 1971.