APA (7th ed.) Citation

Cicero, M. T., Middleton, C., Melmoth, W., & Heberden, W. (1876). Cicero's life and letters. William P. Nimmo.

Chicago Style (17th ed.) Citation

Cicero, Marcus Tullius, Conyers Middleton, William Melmoth, and William Heberden. Cicero's Life and Letters. London: William P. Nimmo, 1876.

MLA (9th ed.) Citation

Cicero, Marcus Tullius, et al. Cicero's Life and Letters. William P. Nimmo, 1876.