APA (7th ed.) Citation

Knox, V., Cicero, M. T., Pliny, t. Y., & Melmoth, W. Elegant epistles, or, A copious collection of familiar and amusing letters.

Chicago Style (17th ed.) Citation

Knox, Vicesimus, Marcus Tullius Cicero, the Younger Pliny, and William Melmoth. Elegant Epistles, or, A Copious Collection of Familiar and Amusing Letters.

MLA (9th ed.) Citation

Knox, Vicesimus, et al. Elegant Epistles, or, A Copious Collection of Familiar and Amusing Letters.