APA (7th ed.) Citation

Horace, Carne-Ross, D. S., & Haynes, K. (1996). Horace in English. Penguin Books.

Chicago Style (17th ed.) Citation

Horace, D. S. Carne-Ross, and Kenneth Haynes. Horace in English. London ; New York: Penguin Books, 1996.

MLA (9th ed.) Citation

Horace, et al. Horace in English. Penguin Books, 1996.