APA (7th ed.) Citation

Finley, M. I., Mack Smith, D., & Duggan, C. (1986). A history of Sicily. Chatto & Windus.

Chicago Style (17th ed.) Citation

Finley, M. I., Denis Mack Smith, and Christopher Duggan. A History of Sicily. London: Chatto & Windus, 1986.

MLA (9th ed.) Citation

Finley, M. I., et al. A History of Sicily. Chatto & Windus, 1986.