APA (7th ed.) Citation

Walpole, H., Beckford, W., Polidori, J. W., Byron, G. G. B., & Bleiler, E. F. (1966). The castle of Otranto. Dover Publications.

Chicago Style (17th ed.) Citation

Walpole, Horace, William Beckford, John William Polidori, George Gordon Byron Byron, and E. F. Bleiler. The Castle of Otranto. New York: Dover Publications, 1966.

MLA (9th ed.) Citation

Walpole, Horace, et al. The Castle of Otranto. Dover Publications, 1966.