APA (7th ed.) Citation

Williams, R. V. (1971). Sir John in Love An opera in four acts. Oxford University Press.

Chicago Style (17th ed.) Citation

Williams, R. Vaughan. Sir John in Love An Opera in Four Acts. Oxford University Press, 1971.

MLA (8th ed.) Citation

Williams, R. Vaughan. Sir John in Love An Opera in Four Acts. Oxford University Press, 1971.

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