APA (7th ed.) Citation

Bishop Percy's folio manuscript, Percy, T., & Hales, J. W. (1868). Ballads and romances. Trubner.

Chicago Style (17th ed.) Citation

Bishop Percy's folio manuscript, Thomas Percy, and John Wesley Hales. Ballads and Romances. London: Trubner, 1868.

MLA (9th ed.) Citation

Bishop Percy's folio manuscript, et al. Ballads and Romances. Trubner, 1868.