Cicero:
select letters, with historical introductions, notes and appendices.

APA Citation

Cicero, M. Tullius., Clark, A. Curtis., How, W. W. (Walter Wybergh)., Watson, A. (19261929). Cicero: select letters, with historical introductions, notes and appendices. A new ed. Oxford: The Clarendon press.

MLA Citation

Cicero, Marcus Tullius, Albert Curtis Clark, W. W. (Walter Wybergh) How, and Albert Watson. Cicero: Select Letters, With Historical Introductions, Notes And Appendices. A new ed. Oxford: The Clarendon press, 19261929.

Warning: These citations may not always be complete (especially for serials).