APA (7th ed.) Citation

Gay, J., & Bell, J. (1777). Polly: An opera. Printed for John Bell.

Chicago Style (17th ed.) Citation

Gay, John, and John Bell. Polly: An Opera. London: Printed for John Bell, 1777.

MLA (8th ed.) Citation

Gay, John, and John Bell. Polly: An Opera. Printed for John Bell, 1777.